@article{Bertrand2014,
author = {Bertrand, J.T. and Sullivan, T.M. and Knowles, E.A. and Zeeshan, M.F. and Shelton, J.D.},
title= {Contraceptive method skew and shifts in method mix in low- and middle-income countries},
year = {2014},
doi = {10.1363/4014414},
volume = {40},
number = {3},
pages = {144--153},
}