@article{van Gaalen2008,
author = {van Gaalen, R. and Dykstra, P.A. and Flap, H.},
title= {Intergenerational contact beyond the dyad: The role of the sibling network},
year = {2008},
doi = {10.1007/s10433-008-0076-6},
journal = {European Journal of Ageing},
volume = {5},
number = {1},
pages = {19--29},
}