@article{Kaptijn2010,
author = {Kaptijn, R. and Thomese, F. and van Tilburg, T.G. and Liefbroer, A.C.},
title= {How grandparents matter},
year = {2010},
doi = {10.1007/s12110-010-9098-9},
volume = {21},
number = {4},
pages = {393--405},
}