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