Xu-Ping Zhu Shi-Min Hu Chiew-Lan Tai Ralph R. Martin A Marching Method for Computing Intersection Curves of Two Subdivision Solids. 458-471 2005 conf/ima-ms/2005 IMA Conference on the Mathematics of Surfaces http://dx.doi.org/10.1007/11537908_28 db/conf/ima-ms/ima-ms2005.html#ZhuHTM05