@conference{Ric05,
  title = "Cooperative and Non-cooperative Models for slotted-Aloha type MAC protocols",
  author = "Richard T.B. Ma, Vishal Misra, Dan Rubenstein",
  year = "2005",
  month = "sep",
  booktitle = "ACM Sigmetrics Performance Evaluation Review",
  volume = "33",
  number = "2",
  pages = "30-32",
}