@article{Cremene2015, author = "Marcel Cremene and D. Dumitrescu and Ligia Cremene", title = "{-cluster formation in a population after 1000 rounds, for different punishment probabilities , , and . .}", year = "2015", month = "12", url = "https://plos.figshare.com/articles/figure/_cluster_formation_in_a_population_after_1000_rounds_for_different_punishment_probabilities_and_/917046", doi = "10.1371/journal.pone.0087471.g004" }