diff --git a/utils/randomNR.c b/utils/randomNR.c
index 7719e4a023faf8bc5bfc3ef8161662cdab29e606..0ea3bd30b871229331deda5acf410771591e3a1d 100644
--- a/utils/randomNR.c
+++ b/utils/randomNR.c
@@ -2,7 +2,7 @@
 
 // Gerador de números pseudo-aleatórios
 // Período do gerador: 3.138e57 (aprox.)
-// Fonte: Press, W.H.; "Numerical Recipes, 3rd ed.", pp.342)
+// Fonte: Press, W.H.; "Numerical Recipes, 3rd ed.", Cap. 7, pp.342)
 
 static struct Ran {
 	Ullong u,v,w;
@@ -35,12 +35,25 @@ Ullong nrRandom64()
   return (x + randomNR.v) ^ randomNR.w;
 }
 
-// Retorna int-64 bits entre 0 e 1.0
+// Retorna double-64 bits entre 0 e 1.0
 Doub nrDrandom() { return 5.42101086242752217E-20 * nrRandom64(); }
 
 // Retorna int-32 bits entre 0 e 2³² - 1
 Uint nrRandom32() { return (Uint) nrRandom64(); }
 
+/*
+static Ullong (* randFunc) ( void ) = random;
+static Doub (* drandFunc) ( void ) = random;
+static void (* randSeed) ( Ullong ) = srandom;
+
+void setRandGen(Randtype t)
+{
+  if (t == UNIX) { drandFunc = randFunc = random;   randSeed = srandom;}
+  else if (t == UNIX48) { drandFunc = drand48; randFunc = lrand48;   randSeed = srand48;}
+  else if (t == NR) { drandFunc = nrDrandom; randFunc = nrRandom64;   randSeed = nrSeed;}
+}
+*/
+
 /*
 struct Ranq1 {
 	Ullong v;
diff --git a/utils/randomNR.h b/utils/randomNR.h
index 89b1f66b102fe07191fde60b09961d12ae231fc6..69e36bba25627e823d2ad00071981c1676dae641 100644
--- a/utils/randomNR.h
+++ b/utils/randomNR.h
@@ -40,7 +40,7 @@ typedef unsigned char Bool;
 
 // Functions
 // Período do gerador: 3.138e57 (aprox.)
-// Fonte: Press, W.H.; "Numerical Recipes, 3rd ed.", pp.342)
+// Fonte: Press, W.H.; "Numerical Recipes, 3rd ed.", Cap. 7, pp.342)
 
 // Define a semente
 void nrSeed(Ullong j);
@@ -51,4 +51,11 @@ Doub nrDrandom();
 // Retorna int-32 bits entre 0 e 2³² - 1
 Uint nrRandom32();
 
+/*
+// Tipos de geradores
+typedef enum {UNIX, UNIX48, NR} Randtype;
+// Define o tipo de gerador
+void setRandGen(Randtype t);
+*/
+
 #endif /* _RANDOMNR_H_ */