diff --git a/doc/source/user_manual/quickstart.rst b/doc/source/user_manual/quickstart.rst
index 28e73cb..875416e 100644
--- a/doc/source/user_manual/quickstart.rst
+++ b/doc/source/user_manual/quickstart.rst
@@ -646,9 +646,17 @@ the same events for both analyses.
 Models available in ctools
 --------------------------
 
+To be written ... (you may read
+http://gammalib.sourceforge.net/user_manual/modules/model.html#spectral-models for the time being).
+
+
 Using ctools from Python
 ------------------------
 
+To be written ...
+
+
 Frequently asked questions
 --------------------------
 
+To be written ...