diff --git a/Alpha_shapes_3/doc/Alpha_shapes_3/Concepts/FixedAlphaShapeVertex_3.h b/Alpha_shapes_3/doc/Alpha_shapes_3/Concepts/FixedAlphaShapeVertex_3.h
index 555992e2455..f01aa562f21 100644
--- a/Alpha_shapes_3/doc/Alpha_shapes_3/Concepts/FixedAlphaShapeVertex_3.h
+++ b/Alpha_shapes_3/doc/Alpha_shapes_3/Concepts/FixedAlphaShapeVertex_3.h
@@ -5,7 +5,7 @@
 
 This concept describes the requirements for the base vertex of a alpha shape with a fixed value alpha. 
 
-\cgalRefines `TriangulationVertexBase_3.` 
+\cgalRefines `TriangulationVertexBase_3` 
 
 
 \cgalHasModel `CGAL::Fixed_alpha_shape_vertex_base_3`
diff --git a/Box_intersection_d/doc/Box_intersection_d/Concepts/BoxIntersectionTraits_d.h b/Box_intersection_d/doc/Box_intersection_d/Concepts/BoxIntersectionTraits_d.h
index d639c6ea904..7f25cd14401 100644
--- a/Box_intersection_d/doc/Box_intersection_d/Concepts/BoxIntersectionTraits_d.h
+++ b/Box_intersection_d/doc/Box_intersection_d/Concepts/BoxIntersectionTraits_d.h
@@ -7,7 +7,7 @@ sequences of iso-oriented boxes. This concept defines the access
 functions to the dimension, the `id`-number, and the boundaries of 
 the boxes manipulated in these algorithms. 
 
-\cgalRefines `Assignable.` 
+\cgalRefines `Assignable` 
 
 \cgalHasModel CGAL::Box_intersection_d::Box_traits_d
 
diff --git a/Surface_mesh_parameterization/doc/Surface_mesh_parameterization/Concepts/PolyhedronTraitsWithKernel_3.h b/Surface_mesh_parameterization/doc/Surface_mesh_parameterization/Concepts/PolyhedronTraitsWithKernel_3.h
index bd768d5e60a..0729d780b13 100644
--- a/Surface_mesh_parameterization/doc/Surface_mesh_parameterization/Concepts/PolyhedronTraitsWithKernel_3.h
+++ b/Surface_mesh_parameterization/doc/Surface_mesh_parameterization/Concepts/PolyhedronTraitsWithKernel_3.h
@@ -12,7 +12,7 @@ additional requirements to the `PolyhedronTraits_3` concept
 required by `CGAL::Polyhedron_3<Traits>` used within the class 
 `CGAL::Parameterization_polyhedron_adaptor_3<Polyhedron_3_>`. 
 
-\cgalRefines `PolyhedronTraits_3.` 
+\cgalRefines `PolyhedronTraits_3` 
 
 \cgalHasModel `CGAL::Polyhedron_traits_3<Kernel>`
 \cgalHasModel `CGAL::Polyhedron_traits_with_normals_3<Kernel>`