Ioannis P. Ivrissimtzis Rhaleb Zayer Hans-Peter Seidel Polygonal Decomposition of the 1-Ring Neighborhood of the Catmull-Clark Scheme. 101-109 2004 conf/smi/2004 SMI http://doi.ieeecomputersociety.org/10.1109/SMI.2004.46 db/conf/smi/smi2004.html#IvrissimtzisZS04