@article{Coale1990,
author = {Coale, A. J. and Caselli, G.},
title= {Estimation of the number of persons at advanced ages from the number of deaths at each age in the given year and adjacent years},
year = {1990},
journal = {Genus},
volume = {LXV},
number = {1/2},
pages = {1--23},
}