@article{jaamas09,
  author    = {M. Birna van Riemsdijk and Mehdi Dastani and John-Jules {\text{Ch}} Meyer},
  title     = {Goals in Conflict: Semantic Foundations of Goals in Agent Programming},
  journal   = {Autonomous Agents and Multi-Agent Systems},
  year      = {2009},
  volume    = "18",
  number    = "3",
  pages     = "471--500",
  publisher = "Springer",
  address   = "Netherlands"
}