@article{Olesen2012,
author = {Olesen, T.B. and Jensen, K.E. and Nygård, M. and Tryggvadottir, L. and Sparén, P. and Hansen, B.T. and Liaw, K.L. and Kjær, S.K.},
title= {Young age at first intercourse and risk-taking behaviours. A study of nearly 65 000 women in four Nordic countries},
year = {2012},
doi = {10.1093/eurpub/ckr055},
volume = {22},
number = {2},
pages = {220--224},
}