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Hello, 
I need the voronoi diagram of a geometric 2D shape in order to calculate its
medial axis. So I was going through the CGAL manual, precisely at :

http://www.cgal.org/Manual/3.1/doc_html/cgal_manual/Segment_Voronoi_diagram_2/Chapter_main.html

and I figured out that i do not have the following headers: 
- Segment_Voronoi_diagram_filtered_traits_2.h
- Segment_Voronoi_diagram_hierarchy_2.h
 
I installed CGAL 3.3.1 using the windows installer and I am running it on 
Vista
x64 with VS2008.

Someone could help me please?

Thanks 
federico