diff --git a/Packages/Kernel_23/doc_tex/kernel/extensible_kernel.tex b/Packages/Kernel_23/doc_tex/kernel/extensible_kernel.tex
index cb4b3df475c..556415ecdb4 100644
--- a/Packages/Kernel_23/doc_tex/kernel/extensible_kernel.tex
+++ b/Packages/Kernel_23/doc_tex/kernel/extensible_kernel.tex
@@ -180,68 +180,12 @@ scavenge code. We won't explain it in detail, but you see
 that there are \ccc{typedefs} to the new point class and
 the functors. All the other types are inherited.
 
+
+
 \ccHtmlLinksOff
-\begin{ccExampleCode}
-#ifndef MYKERNEL_H
-#define MYKERNEL_H
 
-#include <CGAL/Cartesian/Cartesian_base.h>
-#include <CGAL/Simple_Handle_for.h>
+\ccIncludeExampleCode{Kernel_23/MyKernel.h}
 
-
-#include "MyPointC2.h"
-
-// Taken from include/CGAL/Cartesian/Cartesian_base.h
-
-template < typename K_ >
-struct MyCartesian_base : public CGAL::Cartesian_base< K_ >
-{
-  typedef K_                                Kernel;
-  typedef CGAL::Cartesian_base< K_ >        Base;
-  typedef MyPointC2                         Point_2;
-  typedef MyConstruct_point_2<Kernel>       Construct_point_2;
-  typedef const double*                     Cartesian_const_iterator_2;
-  typedef MyConstruct_coord_iterator        Construct_cartesian_const_iterator_2;
-  typedef MyConstruct_bbox_2<typename Base::Construct_bbox_2> 
-                                            Construct_bbox_2;
-};
-
-
-// Taken from include/CGAL/Cartesian.h
-
-template < typename FT_, typename Kernel >
-struct MyCartesian_base_no_ref_count
-  : public MyCartesian_base< Kernel >
-{
-    typedef FT_                                           RT;
-    typedef FT_                                           FT;
-
-    // The mecanism that allows to specify reference-counting or not.
-    template < typename T >
-    struct Handle { typedef CGAL::Simple_Handle_for<T>   type; };
-
-    template < typename Kernel2 >
-    struct Base { typedef MyCartesian_base_no_ref_count<FT_, Kernel2>  Type; };
-
-    static   FT make_FT(const RT & num, const RT& denom) { return num/denom;}
-    static   FT make_FT(const RT & num)                  { return num;}
-    static   RT FT_numerator(const FT &r)                { return r;}
-    static   RT FT_denominator(const FT &)               { return RT(1);}
-};
-
-template < typename FT_ >
-struct MyKernel
-  : public MyCartesian_base_no_ref_count<FT_, MyKernel<FT_> >
-{
-public:
-  typedef MyCartesian_base_no_ref_count<FT_, MyKernel<FT_> > Kernel_base;
-};
-
-CGAL_ITERATOR_TRAITS_POINTER_SPEC_TEMPLATE(MyKernel)
-
-#endif // MYKERNEL_H
-
-\end{ccExampleCode}
 \ccHtmlLinksOn