@inproceedings{Howison:CADA:2009,
  author = {Mark Howison and Carlo Sequin},
  title = {{CAD Tools for Creating Space-filling 3D Escher Tiles}},
  booktitle = {Computer-Aided Design and Applications},
  year = 2009,
  month = jun,
  volume = 6,
  pages = {737--748},
  address = {Reno, NV, USA},
  note = {LBNL-2467E},
}