@article{Cleland2006,
author = {Cleland, J. and Ali, M.M.},
title= {Sexual abstinence, contraception, and condom use by young African women: A secondary analysis of survey data},
year = {2006},
doi = {10.1016/S0140-6736(06)69738-9},
journal = {The Lancet },
volume = {368},
number = {9549},
pages = {1788--1793},
}