@inproceedings{smi2002sm,
  title = {Simple Manifolds for Surface Modeling and Parameterization},
  author = {Cindy Grimm},
  booktitle = {Shape Modeling International},
  pages = {237--245},
  note = {Spherical, toroidal, and cylindrical manifolds},
  month = {May},
  year = {2002}
}