@article{van Duijn2003,
author = {van Duijn, M.A.J. and Zeggelink, E.P.H. and Huisman, M. and Stokman, F.N. and Wasseur, F.W.},
title= {Evolution of Sociology freshman into a friendship network},
year = {2003},
doi = {10.1080/00222500390213137},
volume = {27},
pages = {153--191},
}