Gilles Debunne Mathieu Desbrun Marie-Paule Cani Alan H. Barr Dynamic real-time deformations using space & time adaptive sampling. 31-36 2001 SIGGRAPH http://portal.acm.org/citation.cfm?id=383259.383262 db/conf/siggraph/siggraph2001.html#DebunneDCB01