TY - JOUR A1 - Voorpostel, M. A1 - van der Lippe, T. A1 - Dykstra, P. A1 - Flap, H. T1 - Similar or different? The importance of similarities and differences for support among siblings Y1 - 2007 DO - 10.1177/0192513X07300713 JF - Journal of Family Issues VL - 28 IS - 8 SP - 1026 EP - -1053 ER -