@article{Santelli2006,
author = {Santelli, J. and Morrow, B. and Anderson, J.E. and Lindberg, L.D.},
title= {Contraceptive use and pregnancy risk among U.S. high school students, 1991-2003},
year = {2006},
doi = {10.1363/3810606},
journal = {Perspectives on Sexual and Reproductive Health},
volume = {38},
number = {2},
pages = {106--111},
}