@article{Manton1981,
author = {Manton, K. G. and Stallard, E. and Vaupel, J. W.},
title= {Methods for Comparing the Mortality Experience of Heterogeneous Populations},
year = {1981},
doi = {10.2307/20610058},
journal = {Demography},
volume = {18},
number = {3},
pages = {389--410},
}