@article{Okun1994,
author = {Okun, B.S.},
title= {Evaluating methods for detecting fertility control: Coale and Trussell's model and Cohort Partity Analysis},
year = {1994},
doi = {10.1080/0032472031000147766},
journal = {Population Studies},
volume = {48},
number = {2},
pages = {193--222},
}