@article{Faugier1997,
author = {Faugier, J. and Sargeant, M.},
title= {Sampling hard to reach populations},
year = {1997},
doi = {10.1046/j.1365-2648.1997.00371.x},
journal = {Journal of Advanced Nursing},
volume = {26},
pages = {790--797},
}