@inproceedings{Torre02WhatIsAJoint,
  author = {Dastani, M. and van der Torre, L.},
  abstract = {In this paper we introduce a qualitative de-
cision and game theory based on belief (B)
and desire (D) rules. We show that a group
of agents acts as if it is maximizing achieved
joint goals.},
  booktitle = {Games with Beliefs and Defeasible Desires. Proceedings of NMR02, Toulouse},
  title = {What is a Joint Goal?},
  url = {http://icr.uni.lu/leonvandertorre/papers/nmr02.pdf},
  year = {2002}
}