@article{Vaupel2003,
author = {Vaupel, J.W. and Canudas-Romo, V.},
title= {Decomposing change in life expectancy: A bouquet of formulas in honor of Nathan Keyfitz’s 90th birthday},
year = {2003},
journal = {Demography },
volume = {40},
number = {2},
pages = {201--216},
}