diff --git a/packages/CLPBN/pfl.tex b/packages/CLPBN/pfl.tex
index 27ed6275f..7e210efb2 100644
--- a/packages/CLPBN/pfl.tex
+++ b/packages/CLPBN/pfl.tex
@@ -23,11 +23,17 @@
 
 \setlength{\parskip}{\baselineskip}
 
-\title{The Prolog Factor Language (PFL)}
-\author{}
+\title{\Huge\textbf{Prolog Factor Language (PFL) Manual}}
+\author{Tiago Gomes, V\'{i}tor Santos Costa}
 \date{}
 
 \maketitle
+\thispagestyle{empty}
+\vspace{5cm}
+\begin{center}
+  \large Last revision: January 8, 2013
+\end{center}
+\newpage
 
 %------------------------------------------------------------------------------
 %------------------------------------------------------------------------------
@@ -38,6 +44,7 @@ The Prolog Factor Language (PFL) is a extension of the Prolog language that allo
 
 
 
+
 %------------------------------------------------------------------------------
 %------------------------------------------------------------------------------
 %------------------------------------------------------------------------------
@@ -120,7 +127,7 @@ $$Type~~F~~;~~Phi~~;~~C.$$
 \end{center}
 \end{figure}
 
-To better explain the language, below we show the PFL representation for network found in Figure~\ref{fig:sprinkler-bn}.
+Towards a better understanding of the language, next we show the PFL representation for network found in Figure~\ref{fig:sprinkler-bn}.
 
 \begin{pflcode}
 :- use_module(library(pfl)).