@article{Marsden1993,
author = {Marsden, P.V.  and Friedkin, N.E. },
title= {Network Studies of Social Influence},
year = {1993},
doi = {10.1177/0049124193022001006},
journal = {Sociological Methods & Research},
volume = {22},
number = {1},
pages = {127--151},
}