diff --git a/.Rbuildignore b/.Rbuildignore
index 13ea85e502e7e07d4e4f771216bd13fc47b3805f..57c8dbd5304dcb3913e080ded10462dd12a3dbb1 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -12,3 +12,4 @@ legTools.bmk
 ^\.gitlab-ci.yml$
 ^\.git$
 ^data-raw$
+^.hooks$
diff --git a/.gitignore b/.gitignore
index 2ae090efac3a351dabbe7a6e5bd8e6d7edf17a4f..5f3053b7c8643ce74c593e89b5dbe2ab0af995c0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,5 @@
 Rplots.pdf
 # Emacs temp files
 \#*\#
-.\#*
\ No newline at end of file
+.\#*
+data-raw/*.txt
diff --git a/.hooks/pre-push b/.hooks/pre-push
new file mode 100755
index 0000000000000000000000000000000000000000..4d1aee2e1d684bed7fc2d2ab94ddad1005bad300
--- /dev/null
+++ b/.hooks/pre-push
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# To use this script, copy it to .git/hooks.
+
+# Return the content in the public datasets folder.
+# ssh leg@$PATAXO -p$PATAXOP "ls -la ~/public_html/legTools/datasets"
+
+# Tranfering data-raw/*.txt files.
+rsync -avzh --progress data-raw/*.txt -e "ssh -p $PATAXOP" \
+      leg@$PATAXO:~/public_html/legTools/datasets/
+
+# Tranfering vignettes/*.html files.
+# Tranfering manual in pdf, zip and tar.gz source files.
diff --git a/R/legTools.R b/R/legTools.R
index 3915d62dbdbc5ae792d711610242a2124206d3b1..115262bcc6e803a275f684b71032537541b8e399 100644
--- a/R/legTools.R
+++ b/R/legTools.R
@@ -33,8 +33,8 @@ NULL
 #'
 #' @format a \code{data.frame} with 20 records and 2 variables.
 #'
-#' @source Frederico, P. (2009). Curso de Estatística Experimental (15th
-#'     ed.). Piracicaba, São Paulo: FEALQ. (page 62)
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 62)
 #'
 #' @examples
 #'
@@ -71,8 +71,8 @@ NULL
 #'
 #' @format a \code{data.frame} with 32 records and 3 variables.
 #'
-#' @source Frederico, P. (2009). Curso de Estatística Experimental (15th
-#'     ed.). Piracicaba, São Paulo: FEALQ. (page 76)
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 76)
 #'
 #' @examples
 #'
@@ -112,8 +112,8 @@ NULL
 #'
 #' @format a \code{data.frame} with 24 records and 3 variables.
 #'
-#' @source Frederico, P. (2009). Curso de Estatística Experimental (15th
-#'     ed.). Piracicaba, São Paulo: FEALQ. (page 91)
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 91)
 #'
 #' @examples
 #'
@@ -235,8 +235,8 @@ NULL
 #'
 #' @format a \code{data.frame} with 24 records and 3 variables.
 #'
-#' @source Frederico, P. (2009). Curso de Estatística Experimental (15th
-#'     ed.). Piracicaba, São Paulo: FEALQ. (page 93)
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 93)
 #'
 #' @examples
 #'
@@ -274,8 +274,8 @@ NULL
 #'
 #' @format a \code{data.frame} with 28 records and 3 variables.
 #'
-#' @source Frederico, P. (2009). Curso de Estatística Experimental (15th
-#'     ed.). Piracicaba, São Paulo: FEALQ. (page 92)
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 92)
 #'
 #' @examples
 #'
@@ -316,8 +316,8 @@ NULL
 #'
 #' @format a \code{data.frame} with 28 records and 3 variables.
 #'
-#' @source Frederico, P. (2009). Curso de Estatística Experimental (15th
-#'     ed.). Piracicaba, São Paulo: FEALQ. (page 96)
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 96)
 #'
 #' @examples
 #'
@@ -384,8 +384,8 @@ NULL
 #'
 #' @format a \code{data.frame} with 28 records and 3 variables.
 #'
-#' @source Frederico, P. (2009). Curso de Estatística Experimental (15th
-#'     ed.). Piracicaba, São Paulo: FEALQ. (page 99)
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 99)
 #'
 #' @examples
 #'
@@ -454,8 +454,8 @@ NULL
 #'
 #' @format a \code{data.frame} with 16 records and 4 variables.
 #'
-#' @source Frederico, P. (2009). Curso de Estatística Experimental (15th
-#'     ed.). Piracicaba, São Paulo: FEALQ. (page 110)
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 110)
 #'
 #' @examples
 #'
@@ -494,8 +494,8 @@ NULL
 #'
 #' @format a \code{data.frame} with 32 records and 4 variables.
 #'
-#' @source Frederico, P. (2009). Curso de Estatística Experimental (15th
-#'     ed.). Piracicaba, São Paulo: FEALQ. (page 115)
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 115)
 #'
 #' @examples
 #'
@@ -545,8 +545,8 @@ NULL
 #'
 #' @format a \code{data.frame} with 16 records and 4 variables.
 #'
-#' @source Frederico, P. (2009). Curso de Estatística Experimental (15th
-#'     ed.). Piracicaba, São Paulo: FEALQ. (page 119)
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 119)
 #'
 #' @examples
 #'
@@ -591,8 +591,8 @@ NULL
 #'
 #' @format a \code{data.frame} with 16 records and 4 variables.
 #'
-#' @source Frederico, P. (2009). Curso de Estatística Experimental (15th
-#'     ed.). Piracicaba, São Paulo: FEALQ. (page 120)
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 120)
 #'
 #' @examples
 #'
@@ -638,8 +638,8 @@ NULL
 #'
 #' @format a \code{data.frame} with 54 records and 6 variables.
 #'
-#' @source Frederico, P. (2009). Curso de Estatística Experimental (15th
-#'     ed.). Piracicaba, São Paulo: FEALQ. (page 126)
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 126)
 #'
 #' @examples
 #'
@@ -679,12 +679,12 @@ NULL
 #'
 #' @keywords datasets
 #'
-#' @usage data(sugarcaneYield4)
+#' @usage data(mangoAcidity)
 #'
 #' @format a \code{data.frame} with 54 records and 6 variables.
 #'
-#' @source Frederico, P. (2009). Curso de Estatística Experimental (15th
-#'     ed.). Piracicaba, São Paulo: FEALQ. (page 132)
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 132)
 #'
 #' Simão, S. (1960). Estudo da planta e dos frutos da mangueira
 #'     (\emph{Manginifera indica} L.). Piracicaba, 1960. Thesis.
@@ -692,7 +692,6 @@ NULL
 #' @examples
 #'
 #' library(lattice)
-#' library(latticeExtra)
 #'
 #' data(mangoAcidity)
 #' str(mangoAcidity)
@@ -728,7 +727,7 @@ NULL
 #'   \item \code{acid} mean of corn yield in 16 locations (ton/ha).
 #' }
 #'
-#' @details The experiment was caried out in 16 different locations but
+#' @details The experiment was carried out in 16 different locations but
 #'     only the mean by cell combinations were available in the text
 #'     book.
 #'
@@ -736,12 +735,12 @@ NULL
 #'
 #' @keywords datasets
 #'
-#' @usage data(sugarcaneYield4)
+#' @usage data(cornYield2)
 #'
 #' @format a \code{data.frame} with 9 records and 5 variables.
 #'
-#' @source Frederico, P. (2009). Curso de Estatística Experimental (15th
-#'     ed.). Piracicaba, São Paulo: FEALQ. (page 132)
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 132)
 #'
 #' Simão, S. (1960). Estudo da planta e dos frutos da mangueira
 #'     (\emph{Manginifera indica} L.). Piracicaba, 1960. Thesis.
@@ -765,3 +764,55 @@ NULL
 #'        xlab="Nutrient content")
 #'
 NULL
+
+#' @name coffeeFert
+#'
+#' @title Number of dry branches in coffee trees as function of NPK
+#'
+#' @description These data are from a \eqn{2^3} factorial experiment
+#'     studing the effect of NPK fertilizaton on the number of dry
+#'     branches in coffee trees.
+#'
+#' \itemize{
+#'   \item \code{N} content of nitrogen in the fertilizer (low/high).
+#'   \item \code{P} content of phosphorus in the fertilizer (low/high).
+#'   \item \code{K} content of potassium in the fertilizer (low/high).
+#'   \item \code{block} an unordered factor representing the blocks
+#'     used.
+#'   \item \code{branches} an integer variable, the number of dry
+#'     branches in a coffee the.
+#' }
+#'
+#' @details The experiment was carried out in a randomized block design
+#'     with 6 blocks. In the book, the data is presented at squared root
+#'     scale.
+#'
+#' @docType data
+#'
+#' @keywords datasets
+#'
+#' @usage data(coffeeFert)
+#'
+#' @format a \code{data.frame} with 48 records and 5 variables.
+#'
+#' @source Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+#'     (15th ed.). Piracicaba, São Paulo: FEALQ. (page 137)
+#'
+#' Malavolta, E.; Pimentel Gomes, F.; Coury, T. (1958). Estudos sobre a
+#'     alimentação mineral do cafeeiro (\emph{Coffea arabica} L.,
+#'     variedade Bourbon Vermelho). Piracicaba.
+#'
+#' @examples
+#'
+#' library(lattice)
+#' library(latticeExtra)
+#'
+#' data(coffeeFert)
+#' str(coffeeFert)
+#'
+#' xyplot(branches~N|P, groups=K,
+#'        data=coffeeFert, type=c("p", "a"),
+#'        ylab=expression(Branches~(plant^{-1})),
+#'        xlab="Nutrient level")
+#'
+NULL
diff --git a/data-raw/RData2txt.R b/data-raw/RData2txt.R
new file mode 100644
index 0000000000000000000000000000000000000000..9a80af4869d8892c774488f3498cb7d406a841c9
--- /dev/null
+++ b/data-raw/RData2txt.R
@@ -0,0 +1,50 @@
+##======================================================================
+## Generate plain text files from the RData files for all datasets in
+## the package.
+##======================================================================
+
+f <- list.files(path="../data", pattern="*.RData")
+
+sapply(f,
+       FUN=function(f){
+           load(paste0("../data/", f))
+           ## ls()
+           g <- sub("\\.RData", "", f)
+           txt <- paste0(g, ".txt")
+           dataset <- eval(parse(text=g))
+           cat(file=txt, sep="\n",
+               "##----------------------------------------------------------------------",
+               "## This dataset is part of legTools package.",
+               "## Visit http://git.leg.ufpr.br/leg/legTools for details.",
+               "##----------------------------------------------------------------------")
+           write.table(x=dataset,
+                       file=txt,
+                       sep="\t", quote=FALSE, row.names=FALSE,
+                       append=TRUE)
+       })
+
+##----------------------------------------------------------------------
+## Uploading files to the public folder: www.leg.ufpr.br/~leg/legTools.
+
+## Port and IP.
+u <- scan(n=2, what=character())
+
+## Verifica o conteúdo do diretório /datasets.
+cmd <- paste0("ssh leg@", u[2], " -p", u[1],
+              " \"ls -la /home/leg/public_html/legTools/datasets\"")
+system(cmd)
+
+## By scp.
+## cmd <- paste0("scp -P ", u[1], " *.txt leg@", u[2],
+##               ":/home/leg/public_html/legTools/datasets")
+## system(cmd)
+
+## By rsync.
+cmd <- paste0("rsync -avzh --progress *.txt ",
+              "-e \"ssh -p ", u[1], "\" leg@", u[2],
+              ":~/public_html/legTools/datasets/")
+system(cmd)
+
+url <- "http://www.leg.ufpr.br/~leg/legTools/datasets"
+browseURL(url)
+
diff --git a/data-raw/coffeeFert.R b/data-raw/coffeeFert.R
new file mode 100644
index 0000000000000000000000000000000000000000..f799d122e9e0c0b0bb917dfe903cbe8a7866463e
--- /dev/null
+++ b/data-raw/coffeeFert.R
@@ -0,0 +1,78 @@
+##----------------------------------------------------------------------
+## Data generation.
+
+coffeeFert <- expand.grid(N=c(-1,1), P=c(-1,1), K=c(-1,1),
+                          block=gl(6, 1), KEEP.OUT.ATTRS=FALSE)
+
+coffeeFert$branches <- c(104, 29, 73, 78, 71, 5, 44, 19, 57, 58, 155,
+                         45, 13, 10, 39, 4, 58, 22, 53, 14, 25, 1, 15,
+                         3, 111, 11, 70, 9, 21, 1, 11, 7, 64, 30, 64,
+                         89, 64, 15, 84, 7, 21, 18, 37, 15, 23, 5, 10,
+                         0)
+
+## coffeeFert$sqrtBranches <- sqrt(coffeeFert$branches)
+
+str(coffeeFert)
+
+save(coffeeFert, file="../data/coffeeFert.RData")
+
+##----------------------------------------------------------------------
+## Examples.
+
+library(lattice)
+library(latticeExtra)
+
+data(coffeeFert)
+str(coffeeFert)
+
+xyplot(branches~N|P, groups=K,
+       data=coffeeFert, type=c("p", "a"),
+       ylab=expression(Branches~(plant^{-1})),
+       xlab="Nutrient level")
+
+range(coffeeFert$branches)
+
+## Sum a positive number to avoid zeros and allow BoxCox
+## transformation.
+m0 <- lm(branches+1~block+(N+P+K)^3, data=coffeeFert)
+
+## Departures from homecedasticity and normality.
+par(mfrow=c(2,2)); plot(m0); layout(1)
+
+MASS::boxcox(m0)
+abline(v=0, col=2)
+
+m1 <- update(m0, log(.)~.)
+par(mfrow=c(2,2)); plot(m1); layout(1)
+
+anova(m1)
+
+m2 <- update(m1, .~block+N*K)
+par(mfrow=c(2,2)); plot(m2); layout(1)
+
+anova(m1, m2)
+anova(m2)
+
+summary(m2)
+
+pred <- expand.grid(block="1",
+                    N=seq(-1, 1, by=0.1),
+                    K=seq(-1, 1, by=0.1))
+pred$mu <- predict(m2, newdata=pred)
+
+wireframe(mu~N+K, data=pred,
+          scales=list(arrows=FALSE),
+          zlab=list(expression(log(Branches+1)), rot=90),
+          drape=TRUE, cuts=20,
+          col.regions=colorRampPalette(
+              color=brewer.pal(n=11, name="Spectral"))(21))
+
+levelplot(mu~N+K, data=pred, aspect=1,
+          main=expression(log(Branches+1)),
+          col.regions=colorRampPalette(
+              color=brewer.pal(n=11, name="Spectral")))
+
+rm(list=ls())
+load("../data/coffeeFert.RData")
+ls()
+str(coffeeFert)
diff --git a/data/coffeeFert.RData b/data/coffeeFert.RData
new file mode 100644
index 0000000000000000000000000000000000000000..b86ba2ae621e613e72cb12359ed765231426b18f
Binary files /dev/null and b/data/coffeeFert.RData differ
diff --git a/man/cassavaYield.Rd b/man/cassavaYield.Rd
index 9cf4bd0b4eff74c7971081c84602c284293c6049..286b7221910bd30610ff7e84a8e499cec3439c92 100644
--- a/man/cassavaYield.Rd
+++ b/man/cassavaYield.Rd
@@ -6,8 +6,8 @@
 \title{Cassava variety competition experiment}
 \format{a \code{data.frame} with 24 records and 3 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental (15th
-    ed.). Piracicaba, São Paulo: FEALQ. (page 93)
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 93)
 }
 \usage{
 data(cassavaYield)
diff --git a/man/coffeeFert.Rd b/man/coffeeFert.Rd
new file mode 100644
index 0000000000000000000000000000000000000000..9632a965d942c237f721ab8542ee6056673d9136
--- /dev/null
+++ b/man/coffeeFert.Rd
@@ -0,0 +1,52 @@
+% Generated by roxygen2 (4.1.1): do not edit by hand
+% Please edit documentation in R/legTools.R
+\docType{data}
+\name{coffeeFert}
+\alias{coffeeFert}
+\title{Number of dry branches in coffee trees as function of NPK}
+\format{a \code{data.frame} with 48 records and 5 variables.}
+\source{
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 137)
+
+Malavolta, E.; Pimentel Gomes, F.; Coury, T. (1958). Estudos sobre a
+    alimentação mineral do cafeeiro (\emph{Coffea arabica} L.,
+    variedade Bourbon Vermelho). Piracicaba.
+}
+\usage{
+data(coffeeFert)
+}
+\description{
+These data are from a \eqn{2^3} factorial experiment
+    studing the effect of NPK fertilizaton on the number of dry
+    branches in coffee trees.
+
+\itemize{
+  \item \code{N} content of nitrogen in the fertilizer (low/high).
+  \item \code{P} content of phosphorus in the fertilizer (low/high).
+  \item \code{K} content of potassium in the fertilizer (low/high).
+  \item \code{block} an unordered factor representing the blocks
+    used.
+  \item \code{branches} an integer variable, the number of dry
+    branches in a coffee the.
+}
+}
+\details{
+The experiment was carried out in a randomized block design
+    with 6 blocks. In the book, the data is presented at squared root
+    scale.
+}
+\examples{
+library(lattice)
+library(latticeExtra)
+
+data(coffeeFert)
+str(coffeeFert)
+
+xyplot(branches~N|P, groups=K,
+       data=coffeeFert, type=c("p", "a"),
+       ylab=expression(Branches~(plant^{-1})),
+       xlab="Nutrient level")
+}
+\keyword{datasets}
+
diff --git a/man/cornYield.Rd b/man/cornYield.Rd
index 7c7d0580367cb88c9d9e49a22fac3b7036e31580..79457d6afe9309b1ce9b1c7163763d6b045afb8f 100644
--- a/man/cornYield.Rd
+++ b/man/cornYield.Rd
@@ -6,8 +6,8 @@
 \title{Corn yield as function of fertilization with NPK}
 \format{a \code{data.frame} with 32 records and 4 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental (15th
-    ed.). Piracicaba, São Paulo: FEALQ. (page 115)
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 115)
 }
 \usage{
 data(cornYield)
diff --git a/man/cornYield2.Rd b/man/cornYield2.Rd
index e6f18b139b10b52eb16a3583cb58d9c023e62644..c4f825233b6002cc72778c93ee0b7f1a306d169a 100644
--- a/man/cornYield2.Rd
+++ b/man/cornYield2.Rd
@@ -6,14 +6,14 @@
 \title{Axial factorial NPK experiment with added treatments}
 \format{a \code{data.frame} with 9 records and 5 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental (15th
-    ed.). Piracicaba, São Paulo: FEALQ. (page 132)
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 132)
 
 Simão, S. (1960). Estudo da planta e dos frutos da mangueira
     (\emph{Manginifera indica} L.). Piracicaba, 1960. Thesis.
 }
 \usage{
-data(sugarcaneYield4)
+data(cornYield2)
 }
 \description{
 These data are from an axial 3 factorial experiment
@@ -30,7 +30,7 @@ These data are from an axial 3 factorial experiment
 }
 }
 \details{
-The experiment was caried out in 16 different locations but
+The experiment was carried out in 16 different locations but
     only the mean by cell combinations were available in the text
     book.
 }
diff --git a/man/filterCake.Rd b/man/filterCake.Rd
index 6ddae712d3635d514921f43d8296b20c26f83a62..8d859f0ae444722d9de14ac21e8d19a7058a9e45 100644
--- a/man/filterCake.Rd
+++ b/man/filterCake.Rd
@@ -6,8 +6,8 @@
 \title{Fertilization with filter cake and mineral}
 \format{a \code{data.frame} with 16 records and 4 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental (15th
-    ed.). Piracicaba, São Paulo: FEALQ. (page 120)
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 120)
 }
 \usage{
 data(filterCake)
diff --git a/man/mangoAcidity.Rd b/man/mangoAcidity.Rd
index 85fb633e3498df0486d95aac11912c4d51d5cb39..2185e702f067566c1ce760c5a76e3a10e4ea95df 100644
--- a/man/mangoAcidity.Rd
+++ b/man/mangoAcidity.Rd
@@ -6,14 +6,14 @@
 \title{Acidity of mango fruits by varieties, years and months}
 \format{a \code{data.frame} with 54 records and 6 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental (15th
-    ed.). Piracicaba, São Paulo: FEALQ. (page 132)
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 132)
 
 Simão, S. (1960). Estudo da planta e dos frutos da mangueira
     (\emph{Manginifera indica} L.). Piracicaba, 1960. Thesis.
 }
 \usage{
-data(sugarcaneYield4)
+data(mangoAcidity)
 }
 \description{
 These data are from an observational study along 3 years
@@ -30,7 +30,6 @@ These data are from an observational study along 3 years
 }
 \examples{
 library(lattice)
-library(latticeExtra)
 
 data(mangoAcidity)
 str(mangoAcidity)
diff --git a/man/plowing.Rd b/man/plowing.Rd
index 30c69cacc5761c0d39ad9463b2e461cf81dcf26b..3330108ceb25433beb9f604f9c414ef22b4129e9 100644
--- a/man/plowing.Rd
+++ b/man/plowing.Rd
@@ -6,8 +6,8 @@
 \title{Plowing level on corn yield}
 \format{a \code{data.frame} with 24 records and 3 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental (15th
-    ed.). Piracicaba, São Paulo: FEALQ. (page 91)
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 91)
 }
 \usage{
 data(plowing)
diff --git a/man/potatoYield.Rd b/man/potatoYield.Rd
index 3a0752606e317a05121ac7558ed23f1a5014e590..39588d387b36392e93ffd45ba231c855bb7e75f2 100644
--- a/man/potatoYield.Rd
+++ b/man/potatoYield.Rd
@@ -6,8 +6,8 @@
 \title{Potato variety competition experiment}
 \format{a \code{data.frame} with 32 records and 3 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental (15th
-    ed.). Piracicaba, São Paulo: FEALQ. (page 76)
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 76)
 }
 \usage{
 data(potatoYield)
diff --git a/man/sugarcaneYield.Rd b/man/sugarcaneYield.Rd
index a79e78b4eb9c57758b40d00368ec127201b9f603..c5fa0523d8f5495aeb00db6fc71615c9039eb475 100644
--- a/man/sugarcaneYield.Rd
+++ b/man/sugarcaneYield.Rd
@@ -6,8 +6,8 @@
 \title{Sugarcane variety experiment}
 \format{a \code{data.frame} with 28 records and 3 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental (15th
-    ed.). Piracicaba, São Paulo: FEALQ. (page 92)
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 92)
 }
 \usage{
 data(sugarcaneYield)
diff --git a/man/sugarcaneYield2.Rd b/man/sugarcaneYield2.Rd
index da824a950fb64ee73f38aec5702e2e9c0806c72e..40272aabfac363a7e2382659cca2b77a05bab4ef 100644
--- a/man/sugarcaneYield2.Rd
+++ b/man/sugarcaneYield2.Rd
@@ -6,8 +6,8 @@
 \title{Sugarcane variety competition experiment}
 \format{a \code{data.frame} with 28 records and 3 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental (15th
-    ed.). Piracicaba, São Paulo: FEALQ. (page 96)
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 96)
 }
 \usage{
 data(sugarcaneYield2)
diff --git a/man/sugarcaneYield3.Rd b/man/sugarcaneYield3.Rd
index 048af7a28000f61f627a4957d2ed5d733898fa35..48a9945d9b93f950c23bfe9bc13974093845cc04 100644
--- a/man/sugarcaneYield3.Rd
+++ b/man/sugarcaneYield3.Rd
@@ -6,8 +6,8 @@
 \title{Sugarcane yield as function of fertilization strategy}
 \format{a \code{data.frame} with 28 records and 3 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental (15th
-    ed.). Piracicaba, São Paulo: FEALQ. (page 99)
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 99)
 }
 \usage{
 data(sugarcaneYield3)
diff --git a/man/sugarcaneYield4.Rd b/man/sugarcaneYield4.Rd
index b0a20021e4e7cf9284dde5a41e0adf2d7dd855d4..93ff7e03adc8b270f250fbdf9603f718b05c2207 100644
--- a/man/sugarcaneYield4.Rd
+++ b/man/sugarcaneYield4.Rd
@@ -6,8 +6,8 @@
 \title{Triple factorial NPK fertilization on sugar cane yield}
 \format{a \code{data.frame} with 54 records and 6 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental (15th
-    ed.). Piracicaba, São Paulo: FEALQ. (page 126)
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 126)
 }
 \usage{
 data(sugarcaneYield4)
diff --git a/man/vinasseFert.Rd b/man/vinasseFert.Rd
index c52ece6e40284557829e798b3e7279cf95c6783a..def3ee5bcde5361b33d18d242fe70ee7b192b901 100644
--- a/man/vinasseFert.Rd
+++ b/man/vinasseFert.Rd
@@ -6,8 +6,8 @@
 \title{Fertilization with vinasse and mineral}
 \format{a \code{data.frame} with 16 records and 4 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental (15th
-    ed.). Piracicaba, São Paulo: FEALQ. (page 119)
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 119)
 }
 \usage{
 data(vinasseFert)
diff --git a/man/wgPigs.Rd b/man/wgPigs.Rd
index e107692f914c6ec870518286efbb857f8a2c4e78..5efbb505e2b01be6f723391fff87bffd2dd3200f 100644
--- a/man/wgPigs.Rd
+++ b/man/wgPigs.Rd
@@ -6,8 +6,8 @@
 \title{Feeding type in pig weight gain}
 \format{a \code{data.frame} with 20 records and 2 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental (15th
-    ed.). Piracicaba, São Paulo: FEALQ. (page 62)
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 62)
 }
 \usage{
 data(wgPigs)
diff --git a/man/wgPigs2.Rd b/man/wgPigs2.Rd
index 8ac1bb48b2aae8dae99418fa7113c493a9e978b3..697f2abd3a8b7f6ed2b907e3aa81bfc5c9142629 100644
--- a/man/wgPigs2.Rd
+++ b/man/wgPigs2.Rd
@@ -6,8 +6,8 @@
 \title{Age of castration in pig weight gain}
 \format{a \code{data.frame} with 16 records and 4 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental (15th
-    ed.). Piracicaba, São Paulo: FEALQ. (page 110)
+Pimentel Gomes, F. (2009). Curso de Estatística Experimental
+    (15th ed.). Piracicaba, São Paulo: FEALQ. (page 110)
 }
 \usage{
 data(wgPigs2)