@article{Salganik2006,
author = {Salganik, M.},
title= {Variance estimation, design effects, and sample size calculations for respondent-driven sampling},
year = {2006},
doi = {10.1007/s11524-006-9106-x},
journal = {Journal of Urban Health},
volume = {83},
number = {1},
pages = {98--112},
}