Qing Zhang Youetsu Sato Jun-ya Takahashi Kazunobu Muraoka Norishige Chiba Simple cellular automaton-based simulation of ink behaviour and its application to Suibokuga-like 3D rendering of trees. 27-37 1999 10 Journal of Visualization and Computer Animation 1 db/journals/jvca/jvca10.html#ZhangSTMC99