@InProceedings{SCI:Ber1993a,
  author =    "F. Bernardini and V. Ferrucci and A. Paoluzzi and
              V. Pascucci",
  title =     "Product Operator on Cell Complexes",
  booktitle = "SMA '93: Proceedings of the Second Symposium on
              Solid Modeling and Applications",
  pages =     "43--52",
  year =      "1993",
  organization = "ACM",
  month =     "May",
  note =      "held May 19-21, 1993 in Montreal, Quebec,
              Canada",
}