diff --git a/config/gb-style.css b/config/gb-style.css
index 56b8d5de3ffaf1bdef601a6c12fe8974891360f7..fc373f9ca0c66790b3fa52abc788ce922a49e7e9 100644
--- a/config/gb-style.css
+++ b/config/gb-style.css
@@ -59,7 +59,7 @@ table > caption {
 /* References ------------------------------ */
 
 .book .book-body .page-wrapper .page-inner div.references p {
-    text-indent: -1em;
+    text-indent: -1em !important;
     margin-left: 1em;
     text-align: left;
 }
diff --git a/index.Rmd b/index.Rmd
index 61ad32f3d26b6408eab7dd1d5e8cda1f7ba019fa..d495c605059797b77b22a9c942e830bde7c70c84 100644
--- a/index.Rmd
+++ b/index.Rmd
@@ -44,7 +44,7 @@ complement: >
 
 <!-- Imagem de capa. -->
 ```{r, echo = FALSE, results = "asis", eval = isOutput("html")}
-img <- '# {-}\n\n<img src="./config/mpaer-cover.png" width="350" alt="Manual de Planejamento e Análise de Experimentos com R" style="box-shadow: 0 1px 8px 0 rgba(0, 0, 0, 0.6);"/>'
+img <- '# {-}\n\n<div><img src="./config/mpaer-cover.png" width="350" alt="Manual de Planejamento e Análise de Experimentos com R" style="box-shadow: 0 1px 8px 0 rgba(0, 0, 0, 0.6);"/></div>'
 cat(img, "\n")
 ```