@article{spatialsocialdilemmasdilutionmobilityand,
  title = {Spatial social dilemmas: dilution, mobility and grouping effects with imitation dynamics},
  year = {2015},
  eprint = {1511.07740},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1511.07740v1},
}