@article{
  representation-independent,
  author = {Stuart A. Kurtz and Michael J. O'Donnell and James S.
		  Royer},
  title = {How to Prove Representation-Independent Independence
		  Results},
  journal = {Information Processing Letters},
  volume = {24},
  month = {January},
  year = {1987},
  pages = {5--10}
}