@InProceedings{   chao05radio,
  author        = {Dennis L. Chao and Justin Balthrop and Stephanie Forrest},
  title         = {{Adaptive} {Radio}: Achieving consensus using negative preferen
ces},
  booktitle     = {GROUP '05: Proceedings of the 2005 International ACM SIGGROUP
 Conference on Supporting Group Work},
  year          = {2005},
  editor        = {Kjeld Schmidt and Mark Pendergast and Mark Ackerman and Glori
a Mark},
  location      = {Sanibel Island, Florida, United States},
  publisher     = {ACM Press},
  address       = {New York},
  pages         = {120--123},
  isbn = {1-59593-223-2}
}