@article{Handcock2011,
author = {Handcock, M.S. and Gile, K.J. },
title= {Comment: On the concept of snowball sampling},
year = {2011},
doi = {10.1111/j.1467-9531.2011.01243.x},
journal = {Sociological Methodology},
volume = {41},
number = {1},
pages = {367--71},
}