@article{Leopold2015,
author = {Leopold, T. and Skopek, J.},
title= {The delay of grandparenthood: A cohort comparison in East and West Germany},
year = {2015},
doi = {10.1111/jomf.12169},
journal = {Journal of Marriage and Family},
volume = {77},
number = {2},
pages = {441--460},
}