@article{Geurts2012,
author = {Geurts, T. and Poortman, A.-R. and van Tilburg, T.G.},
title= {Older Parents Providing Child Care for Adult Children: Does It Pay Off?},
year = {2012},
doi = {10.1111/j.1741-3737.2011.00952.x},
journal = {Journal of Marriage and Family},
volume = {74},
number = {2},
pages = {239--250},
}