@article{Castro-Martin2010,
author = {Castro-Martin, T.},
title= {Single motherhood and low birthweight in Spain: Narrowing social inequalities in health?},
year = {2010},
doi = {10.4054/DemRes.2010.22.27},
journal = {Demographic Research },
volume = {22},
number = {27},
pages = {863−889},
}