@article{Laham2005,
author = {Laham, S.M. and Gonsalkorale, K. and Von Hippel, W.},
title= {Darwinian grandparenting: Preferential investment in more certain kin},
year = {2005},
doi = {10.1177/0146167204271318},
journal = {Personality and Social Psychology Bulletin},
volume = {31},
number = {1},
pages = {63--72},
}