diff --git a/ChangeLog b/ChangeLog
index 81bfc2b2f..b93244911 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2005-01-27  Alexandre Duret-Lutz  <adl@src.lip6.fr>
+
+	* src/tgbaalgos/gtec/ce.cc (couvreur99_check_result::accepting_cycle):
+	More ref in comment.
+
 2005-01-26  Alexandre Duret-Lutz  <adl@src.lip6.fr>
 
 	* src/tgbaalgos/gv04.cc, src/tgbaalgos/ndfs_result.hxx,
diff --git a/src/tgbaalgos/gtec/ce.cc b/src/tgbaalgos/gtec/ce.cc
index 99a373ce3..023c10465 100644
--- a/src/tgbaalgos/gtec/ce.cc
+++ b/src/tgbaalgos/gtec/ce.cc
@@ -158,7 +158,18 @@ namespace spot
     // restarted from the point reached after we have discovered a
     // transition with a new acceptance conditions.
     //
-    // This idea is taken from Product<T>::findWitness in LBTT 1.1.2.
+    // This idea is taken from Product<T>::findWitness in LBTT 1.1.2,
+    // which in turn is probably inspired from
+    // @Article{	  latvala.00.fi,
+    //   author	= {Timo Latvala and Keijo Heljanko},
+    //   title		= {Coping With Strong Fairness},
+    //   journal	= {Fundamenta Informaticae},
+    //   year		= {2000},
+    //   volume	= {43},
+    //   number	= {1--4},
+    //   pages		= {1--19},
+    //   publisher	= {IOS Press}
+    // }
     const state* substart = ecs_->cycle_seed;
     do
       {