Dongkyoo Lee Hee-Jung Bae Chang Tae Kim Dong-Chun Lee Dae-Hyun Jung Nam-Kyung Lee Kyoo-Ho Lee Nakhoon Baek Jong Won Lee Kwan Woo Ryu James K. Hahn 81-91 2001 12 Journal of Visualization and Computer Animation 2 db/journals/jvca/jvca12.html#LeeBKLJLLBLRH01