@article{Shah2011,
author = {Shah, P.S.  and Zao, J. and Ali, S.},
title= {Maternal marital status and birth outcomes: A systematic review and meta-analyses},
year = {2011},
doi = {10.1007/s10995-010-0654-z},
journal = {Maternal and Child Health Journal},
volume = {15},
number = {7},
pages = {1097--1109},
}