@inproceedings{sno-sto-93-hands,
  author = {Jack Snoeyink and Jorge Stolfi},
  title = {Objects that Cannot be Taken Apart with Two Hands},
  booktitle = {Proceedings of the 9th Annual Symposium on Com\-put\-atio\-nal Geometry (SOCG)},
  location = {San Diego, CA},
  pages = {247--256},
  year = 1993,
  month = may,
  doi = {10.1145/160985.161143},
  organization = {ACM}
}