@article{Wellman1997,
author = {Wellman, Barry and Wong, Renita Yuk-lin and Tindall, David and Nazer, Nancy},
title= {A decade of network change: Turnover, persistence and stability in personal communities},
year = {1997},
URL = {10.1016/S0378-8733(96)00289-4},
journal = {Social Networks},
volume = {19},
number = {1},
pages = {27--50},
}