@article{Zhu2001,
author = {Zhu, B.P. and Haines, K.M. and Le, T. and McGrath-Miller, K. and Boulton, M.L.},
title= {Effect of the interval between pregnancies on perinatal outcomes among white and black women},
year = {2001},
doi = {10.1067/mob.2001.118307},
journal = {American Journal of Obstetrics and Gynecology},
volume = {185},
number = {6},
pages = {1403--1410},
}