@article{Popov1993,
author = {Popov, A. and Visser, A.Ph. and Ketting, E.},
title= {Contraceptive knowledge, attitudes, and practice in Russia during the 1980s},
year = {1993},
doi = {10.2307/2939190},
journal = {Studies in Family Planning},
volume = {24},
number = {4},
pages = {227--236},
}