@article{UckelmanEtAlMLQ2009,
  author = {Joel Uckelman and Yann Chevaleyre and Ulle Endriss and J{\'e}r{\^o}me Lang},
  title = {Representing Utility Functions via Weighted Goals},
  journal = {Mathematical Logic Quarterly},
  year = {2009},
  volume = {55},
  number = {4},
  pages = {341--361}
}