Shanshan Yao Xiaohong Jia 0001 Topological Classification and Determination of Non-Degenerate Intersections of Two Dupin Cyclides. 103406 2022 153 Comput. Aided Des. https://doi.org/10.1016/j.cad.2022.103406 db/journals/cad/cad153.html#YaoJ22