% pubman genre = article
@article{item_1554561,
title = {{Extrinsic rewards undermine altruistic tendencies in 20-month-olds}},
author = {Warneken, Felix and Tomasello, Michael},
language = {eng},
year = {2008},
date = {2008},
journal = {{Developmental Psychology}},
volume = {44},
number = {6},
pages = {1785--1788},
}