@inproceedings{ijcai2013p36,
  title     = {Why Is It So Hard to Say Sorry? Evolution of Apology with Commitments in the iterated Prisoner's Dilemma},
  author    = {Anh, Han The and Pereira, Luís Moniz and Santos, Francisco C. and Lenaerts, Tom},
  booktitle = {Proceedings of the Twenty-Third International Joint Conference on
               Artificial Intelligence, {IJCAI-13}},
  publisher = {AAAI Press / International Joint Conferences on Artificial Intelligence},
  editor    = {Francesca Rossi},
  pages     = {177--182},
  year      = {2013},
  month     = {8},
  url       = {https://ijcai.org/proceedings/2013/36},
}