@article{Smith2003,
author = {Smith, G.C. and Pell, J.P. and Dobbie, R.},
title= {Interpregnancy interval and risk of preterm birth and neonatal death: Retrospective cohort study},
year = {2003},
doi = {10.1136/bmj.327.7410.313},
journal = {British Medical Journal},
volume = {327},
number = {7410},
pages = {313},
}