@inproceedings{CIG-2013-Greenwood,
	author        = "Garrison W. Greenwood",
	booktitle     = "{Proceedings of the Ninth Conference on Computational Inteligence in Games}",
	doi           = "10.1109/CIG.2013.6633615",
	isbn          = "978-1-4673-5308-3",
	pages         = "1--7",
	publisher     = "{IEEE}",
	title         = "{A tag-mediated game designed to study cooperation in human populations}",
	year          = 2013,
}