@article{Voorpostel2007,
author = {Voorpostel, M. and van der Lippe, T. and Dykstra, P. and Flap, H.},
title= {Similar or different? The importance of similarities and differences for support among siblings},
year = {2007},
doi = {10.1177/0192513X07300713},
journal = {Journal of Family Issues},
volume = {28},
number = {8},
pages = {1026--1053},
}