@article{Kramer2010,
author = {Kramer, K.L.},
title= {Cooperative Breeding and its Significance to the Demographic Success of Humans},
year = {2010},
doi = {10.1146/annurev.anthro.012809.105054},
journal = {Annual Review of Anthropology},
volume = {39},
number = {1},
pages = {417--436},
}