@article{Santelli2007,
author = {Santelli, J. and Lindberg, L.D. and Finer, L.B. and Singh, S.},
title= {Explaining recent declines in adolescent pregnancy in the United States: The contribution of abstinence and improved contraceptive use},
year = {2007},
doi = {10.2105/AJPH.2006.089169},
journal = {American Journal of Public Health},
volume = {97},
number = {1},
pages = {150--156},
}