@article{Zeitlin2002,
author = {Zeitlin, J.A. and Saurel-Cubizolles, M.J. and Ancel, P.Y. and the EUROPOP Group},
title= {Marital status, cohabitation, and the risk of preterm birth in Europe: Where births outside marriage are common and uncommon},
year = {2002},
doi = {10.1046/j.1365-3016.2002.00396.x},
journal = {Paediatric and Perinatal Epidemiology},
volume = {16},
number = {2},
pages = {124--130},
}