@article{Rossier2004,
author = {Rossier, C. and Leridon, H. and the Cocon group},
title= {The pill and the condom, substitution or association? An analysis of the contraceptive histories of young women in France, 1978-2000},
year = {2004},
journal = {Population-E},
volume = {59},
number = {3-4},
pages = {387--414},
}