@article{Ponnapalli2005,
author = {Ponnapalli, K.M.},
title= {A comparison of different methods for decomposition of changes in expectation of life at birth and differentials in life expectancy at birth},
year = {2005},
doi = {10.4054/DemRes.2005.12.7},
volume = {12},
number = {7},
pages = {141--72},
}