@article{Carlson2001,
author = {Carlson, E. and Lamb, V.},
title= {Changes in contraceptive use in Bulgaria, 1995-2000},
year = {2001},
doi = {10.1111/j.1728-4465.2001.00329.x},
journal = {Studies in Family Planning},
volume = {32},
number = {4},
pages = {329--338},
}