Yueting Zhuang Congyong Su Li Huang Fei Wu Subdivision Feedback Based 3D Facial Modeling for E-learning. 218-229 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2783&spage=218 2003 conf/icwl/2003 ICWL db/conf/icwl/icwl2003.html#ZhuangSHW03