@article{Zlotnik1981,
author = {Zlotnik, H. and Hill, K.},
title= {The use of hypothetical cohorts in estimating demographic parameters under conditions of changing fertility and mortality},
year = {1981},
doi = {10.2307/2061052},
journal = {Demography},
volume = {18},
number = {1},
pages = {103--122},
}