BibTex format
@article{Gonzalez:2013:10.1098/rspb.2013.1297,
author = {Gonzalez, J-CT and Sheldon, BC and Tobias, JA},
doi = {10.1098/rspb.2013.1297},
journal = {PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES},
title = {Environmental stability and the evolution of cooperative breeding in hornbills},
url = {http://dx.doi.org/10.1098/rspb.2013.1297},
volume = {280},
year = {2013}
}