Eiji Sugisaki Hock Soon Seah Feng Tian Shigeo Morishima Interactive shadowing for 2D Anime. 395-404 2009 20 Journal of Visualization and Computer Animation 2-3 http://dx.doi.org/10.1002/cav.306 db/journals/jvca/jvca20.html#SugisakiSTM09