@article{Tanskanen2014,
author = {Tanskanen, A.O. and Jokela, M. and Danielsbacka, M. and Rotkirch, A. },
title= {Grandparental Effects on Fertility Vary by Lineage in the United Kingdom},
year = {2014},
journal = {Human Nature},
volume = {24},
pages = {in press},
}