@article{JMLR:v9:panait08a,
  author  = {Liviu Panait and Karl Tuyls and Sean Luke},
  title   = {Theoretical Advantages of Lenient Learners:  An Evolutionary Game Theoretic Perspective},
  journal = {Journal of Machine Learning Research},
  year    = {2008},
  volume  = {9},
  number  = {13},
  pages   = {423--457},
  url     = {http://jmlr.org/papers/v9/panait08a.html}
}