@article{ledezma-et-al_aicomm2009,
  author       = {Ledezma, Agapito and Aler, Ricardo and Sanchis, Araceli and Borrajo,
    Daniel},
  journal      = {AI Communications},
  number       = 1,
  pages        = {21 -- 35},
  title        = {OMBO: An opponent modeling approach},
  volume       = 22,
  year         = 2009,
}