@article{Crimmins1996,
author = {Crimmins, E.M. and Hayward, M.D. and Saito, Y.},
title= {Differentials in active life expectancy in the older population of the United States},
year = {1996},
journal = {Journals of Gerontology Series B: Psychological Sciences and Social Sciences},
volume = {51B},
number = {3},
pages = {S111--S120},
}