@article{Goméz de León1989,
author = {Goméz de León, J. and Potter, J.E.},
title= {Modelling the inverse association between breastfeeding and contraceptive use},
year = {1989},
doi = {10.1080/0032472031000143856 },
journal = {Population Studies},
volume = {43},
number = {1},
pages = {69--93},
}