@InBook{Modeling_Communicative_Behavior_using_Permissions_and_Obligations,
  author = "Lalana  Kagal and Tim  Finin",
  title = "{Modeling Communicative Behavior using Permissions and Obligations}",
  month = "January",
  year = "2005",
  series = "Lecture Notes in Computer Science",
  note = "Proceedings of Agent Communication workshop at AAMAS 2004.",
  pages = "120-133",
  booktitle = "Developments in Agent Communication, Eds. Frank Dignum, Rogier van Eijk, Marc-Philippe Huget",
  publisher = "Springer-verlag",
}