@article{Keim2012,
author = {Keim, S. and Klärner, A. and Bernardi, L.},
title= {Tie strength and family formation: Which personal relationships are influential?},
year = {2012},
doi = {10.1111/j.1475-6811.2012.01418.x},
volume = {20},
number = {3},
pages = {462--478},
}