TY - JOUR A1 - van Gaalen, R. A1 - Dykstra, P.A. A1 - Flap, H. T1 - Intergenerational contact beyond the dyad: The role of the sibling network Y1 - 2008 DO - 10.1007/s10433-008-0076-6 JF - European Journal of Ageing VL - 5 IS - 1 SP - 19 EP - -29 ER -