@article{Aassve2012,
author = {Aassve, A. and Meroni, E. and Pronzato, C.},
title= {Grandparenting and childbearing in the extended family},
year = {2012},
doi = {10.1007/s10680-012-9273-2},
volume = {28},
number = {4},
pages = {499--518},
}