Henning Biermann Ioana M. Martin Fausto Bernardini Denis Zorin Cut-and-paste editing of multiresolution surfaces. 312-321 2002 conf/siggraph/2002 SIGGRAPH http://doi.acm.org/10.1145/566570.566583 db/conf/siggraph/siggraph2002.html#BiermannMBZ02