@article{Varea2012,
author = {Varea, C. and Bernis, C. and González, A.},
title= {Maternal characteristics and temporal trends in birth outcomes: Comparison between Spanish and migrant mothers},
year = {2012},
doi = {10.1155/2012/412680},
journal = {International Journal of Population Research},
volume = {2012},
number = {ID 412680},
pages = {8 pages},
}