@article{Cleland2011,
author = {Cleland, J.G. and Ndugwa, R.P. and Zulu, E.M.},
title= {Family planning in sub-Saharan Africa: Progress or stagnation?},
year = {2011},
doi = {10.2471/BLT.10.077925},
volume = {89},
number = {2},
pages = {137--143},
}