Eric Galin Samir Akkouche Incremental Techniques for Implicit Surface Modeling. 312- 1998 conf/cgi/1998 Computer Graphics International https://doi.org/10.1109/CGI.1998.694282 https://doi.ieeecomputersociety.org/10.1109/CGI.1998.694282 db/conf/cgi/cgi1998.html#GalinA98