Ryutarou Ohbuchi Akio Mukaiyama Shigeo Takahashi Watermarking a 3D Shape Model Defined as a Point Set. 392-399 2004 conf/cw/2004 CW http://doi.ieeecomputersociety.org/10.1109/CW.2004.70 db/conf/cw/cw2004.html#OhbuchiMT04