@article{Manlove2007,
author = {Manlove, Jennifer and Ryan, Suzanne and Franzetta, Kerry},
title= {Contraceptive use patterns across teens’ sexual relationships: The role of relationships, partners, and sexual histories},
year = {2007},
doi = {10.1353/dem.2007.0031},
journal = {Demography},
volume = {44},
number = {3},
pages = {603--621},
}