@inproceedings{Torre08PartImpSemForGoalChange,
  author = {Patrice caire, Serena Villata , Leendert van der Torre, Guido Boella},
  title = {Conviviality Masks in Role-Based Institutions Multi-Agent Teleconferencing in Virtual Worlds},
  booktitle = {Proceedings of AAMAS 2008)},
  year = {2008}
}