@article{Jappens2012,
author = {Jappens, M. and Van Bavel, J.},
title= {Regional family norms and child care by grandparents in Europe},
year = {2012},
doi = {10.4054/DemRes.2012.27.4},
journal = {Demographic Research, Special Collection},
volume = {27},
number = {4},
pages = {85--120},
}