Der-Lor Way Sheng-Wen Huang Zen-Chung Shih Physical-based Model of Ink Diffusion in Chinese Paintings. 2003 conf/wscg/2003 WSCG http://wscg.zcu.cz/wscg2003/Papers_2003/H89.pdf db/conf/wscg/wscg2003.html#WayHS03