@article{Bearman2001,
author = {Bearman, P.S. and Bruckner, H.},
title= {Promising the Future: Virginity Pledges and First Intercourse},
year = {2001},
doi = {10.1086/320295},
journal = {American Journal of Sociology},
volume = {106},
number = {4},
pages = {859--912},
}