@article{Bunt1999,
author = {Bunt, G.G. and Duijn, A.J. and Snijders, A.B.},
title= {Friendship networks trough time: An actor-oriented dynamic statistical network model},
year = {1999},
doi = {10.1023/A:1009683123448},
volume = {5},
pages = {167--192},
}