@article{Heckathorn1999,
author = {Heckathorn, D.D. and Broadhead, R.S. and Anthony, D.L. and Weakliem, D.L.},
title= {AIDS and social networks: HIV prevention through network mobilization},
year = {1999},
URL = {http://www.respondentdrivensampling.org/reports/sociological_focus.pdf},
journal = {Sociological Focus},
volume = {32},
number = {2},
pages = {159--179},
}