Jorge Rodríguez Federico Thomas Dolors Ayala Lluís Ros Efficient Computation of 3D Skeletons by Extreme Vertex Encoding. 338-347 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2886&spage=338 2003 conf/dgci/2003 DGCI db/conf/dgci/dgci2003.html#RodriguezTAR03