diff --git a/Doc/ref.tex b/Doc/ref.tex
index ff4e75b..ed4abc8 100644
--- a/Doc/ref.tex
+++ b/Doc/ref.tex
@@ -57,14 +57,14 @@
 
 \pagenumbering{arabic}
 
-\include{ref1}
-\include{ref2}
-\include{ref3}
-\include{ref4}
-\include{ref5}
-\include{ref6}
-\include{ref7}
-\include{ref8}
+\include{ref1}		% Introduction
+\include{ref2}		% Lexical analysis
+\include{ref3}		% Data model
+\include{ref4}		% Execution model
+\include{ref5}		% Expressions and conditions
+\include{ref6}		% Simple statements
+\include{ref7}		% Compound statements
+\include{ref8}		% Top-level components
 \inclide{ref.ind}
 
 \end{document}
diff --git a/Doc/ref/ref.tex b/Doc/ref/ref.tex
index ff4e75b..ed4abc8 100644
--- a/Doc/ref/ref.tex
+++ b/Doc/ref/ref.tex
@@ -57,14 +57,14 @@
 
 \pagenumbering{arabic}
 
-\include{ref1}
-\include{ref2}
-\include{ref3}
-\include{ref4}
-\include{ref5}
-\include{ref6}
-\include{ref7}
-\include{ref8}
+\include{ref1}		% Introduction
+\include{ref2}		% Lexical analysis
+\include{ref3}		% Data model
+\include{ref4}		% Execution model
+\include{ref5}		% Expressions and conditions
+\include{ref6}		% Simple statements
+\include{ref7}		% Compound statements
+\include{ref8}		% Top-level components
 \inclide{ref.ind}
 
 \end{document}