Yoshiyuki Furukawa Hiroshi Masuda Kenjiro T. Miura Hiroyuki Yamato Cut-and-Paste Editing Based on Constrained B-spline Volume Fitting. 222-225 2003 conf/cgi/2003 Computer Graphics International http://doi.ieeecomputersociety.org/10.1109/CGI.2003.1214470 db/conf/cgi/cgi2003.html#FurukawaMMY03