@article{Rözer2016,
author = {Rözer, J.J. and Mollenhorst, G. and Poortman, A.},
title= {Family and friends: Which types of personal relationships go together in a network?},
year = {2016},
doi = {10.1007/s11205-015-0987-5},
journal = {Social Indicators Research},
volume = {127},
number = {2},
pages = {809--826},
}