Elmar Wurm Bert Jüttler Myung-Soo Kim Approximate Rational Parameterization of Implicitly Defined Surfaces. 434-447 2005 conf/ima-ms/2005 IMA Conference on the Mathematics of Surfaces http://dx.doi.org/10.1007/11537908_26 db/conf/ima-ms/ima-ms2005.html#WurmJK05