@article{Fortney1984,
author = {Fortney, J. and Higgins, J.},
title= {The effect of birth interval on perinatal survival and birth weight},
year = {1984},
doi = {10.1016/S0033-3506(84)80099-2},
journal = {Public Health},
volume = {98},
number = {2},
pages = {73--83},
}