% pubman genre = article
@article{item_2183505,
title = {{Increased costs of cooperation help cooperators in the long run}},
author = {Smaldino, Paul E. and Schank, Jeffrey C. and McElreath, Richard},
language = {eng},
issn = {0003-0147},
doi = {10.1086/669615},
publisher = {University of Chicago Press},
year = {2013},
date = {2013-04},
journal = {{The American Naturalist}},
volume = {181},
number = {4},
pages = {451--463},
}