diff --git a/modules.tex b/modules.tex
index c2a8ae6f8..f34969c40 100644
--- a/modules.tex
+++ b/modules.tex
@@ -1538,6 +1538,9 @@ \section{Coherent modules}
 \label{section-coherent}
 
 \noindent
+A reference for this section is \cite{FAC}.
+
+\medskip\noindent
 The category of coherent sheaves on a ringed space $X$
 is a more reasonable object
 than the category of quasi-coherent sheaves, in the sense