@Inproceedings{beaufils98complete,
  author = {Beaufils, Bruno and Delahaye, Jean-Paul and Mathieu, Philippe},
  title  = {Complete Classes of Strategies for the Classical Iterated Prisoner's Dilemma},

  year   = {1998},
  number = {},
  url    = {citeseer.ist.psu.edu/beaufils98complete.html},

  const  = {\ text}
}
@Article{omwgagsftipd,
  author = {Beaufils, Bruno and Delahaye, Jean-Paul and Mathieu, Philippe},
  title  = {Our Meeting With Gradual: A Good Strategy For The Iterated Prisoner's Dilemma},

  year   = {1997},
  number = {},
  url    = {},

  const  = {\ text}
}