@article{Crimmins1997,
author = {Crimmins, E. M. and Saito, Y. and Ingegneri, D.},
title= {Trends in disability-free life expectancy in the United States, 1970-90},
year = {1997},
doi = {10.2307/2137572},
journal = {Population and development review},
volume = {23},
pages = {555--572},
}