diff --git a/lv6-ref-man/lv6-ref-man.tex b/lv6-ref-man/lv6-ref-man.tex
index 899383c09add0ff1bd4e293cfd6766c822f83d91..e2ab2e1b34b8e16035205c343a3ca8e8b5d6952f 100644
--- a/lv6-ref-man/lv6-ref-man.tex
+++ b/lv6-ref-man/lv6-ref-man.tex
@@ -39,7 +39,14 @@ iterators. But the main novelty resides in the introduction of a
 package mechanism.  Readers already familiar with Lustre ought to
 read directly this chapter.
 
+\section*{nota bene}
 
+This document is the Language Reference Manual. For documentation related to
+tools (compiler, etc), please look at:
+\begin{itemize}
+\item \href{https://www-verimag.imag.fr/DIST-TOOLS/SYNCHRONE/reactive-toolbox}{https://www-verimag.imag.fr/DIST-TOOLS/SYNCHRONE/reactive-toolbox}
+\item \href{https://verimag.gricad-pages.univ-grenoble-alpes.fr/vtt/tags/lustre/}{https://verimag.gricad-pages.univ-grenoble-alpes.fr/vtt/tags/lustre/}
+\end{itemize}
 
 
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