diff --git a/Boolean_set_operations_2/doc/Boolean_set_operations_2/Concepts/GpsTraitsGeneralPolygonWithHoles_2.h b/Boolean_set_operations_2/doc/Boolean_set_operations_2/Concepts/GpsTraitsGeneralPolygonWithHoles_2.h
index fd659fab279..15dc321e736 100644
--- a/Boolean_set_operations_2/doc/Boolean_set_operations_2/Concepts/GpsTraitsGeneralPolygonWithHoles_2.h
+++ b/Boolean_set_operations_2/doc/Boolean_set_operations_2/Concepts/GpsTraitsGeneralPolygonWithHoles_2.h
@@ -5,11 +5,11 @@
 
 A model of this concept represents a general polygon with holes. 
 
-\cgalRefines DefaultConstructible
-\cgalRefines CopyConstructible
-\cgalRefines Assignable
+\cgalRefines `DefaultConstructible`
+\cgalRefines `CopyConstructible`
+\cgalRefines `Assignable`
 
-\cgalGeneralizes ::GeneralPolygonWithHoles_2 
+\cgalGeneralizes `GeneralPolygonWithHoles_2` 
 
 \cgalHasModel `GeneralPolygonSetTraits_2::Polygon_with_holes2` 
 
diff --git a/Boolean_set_operations_2/doc/Boolean_set_operations_2/Concepts/GpsTraitsGeneralPolygon_2.h b/Boolean_set_operations_2/doc/Boolean_set_operations_2/Concepts/GpsTraitsGeneralPolygon_2.h
index e0a7fb50611..02082c9bbcf 100644
--- a/Boolean_set_operations_2/doc/Boolean_set_operations_2/Concepts/GpsTraitsGeneralPolygon_2.h
+++ b/Boolean_set_operations_2/doc/Boolean_set_operations_2/Concepts/GpsTraitsGeneralPolygon_2.h
@@ -9,7 +9,7 @@ A model of this concept represents a simple general polygon.
 \cgalRefines `CopyConstructible`
 \cgalRefines `Assignable`
 
-\cgalGeneralizes ::GeneralPolygon_2 
+\cgalGeneralizes `GeneralPolygon_2` 
 
 \cgalHasModel `GeneralPolygonSetTraits_2::Polygon_2` 
 \cgalHasModel `CGAL::Polygon_2<PolygonTraits_2, Container>`