@article{Coall2014,
author = {Coall, D.A. and Hilbrand, S. and Hertwig, R.},
title= {Predictors of grandparental investment decisions in contemporary Europe: Biological relatedness and beyond},
year = {2014},
doi = {10.1371/journal.pone.0084082},
journal = {PLoS One},
volume = {9},
number = {1},
pages = {e84082},
}