diff --git a/Polygon/doc_tex/Polygon_ref/PolygonTraits_2.tex b/Polygon/doc_tex/Polygon_ref/PolygonTraits_2.tex
index c495af9d189..c22d8de9e12 100644
--- a/Polygon/doc_tex/Polygon_ref/PolygonTraits_2.tex
+++ b/Polygon/doc_tex/Polygon_ref/PolygonTraits_2.tex
@@ -71,7 +71,9 @@ types must exist.
 
 \ccHasModels
 
-The kernels supplied by CGAL are models of \ccRefName.
+The kernels supplied by \cgal\ are models of \ccRefName. 
+
+\ccRefConceptPage{Projection_traits_xy_3<K>}
 
 \ccSeeAlso