@inbook{Wolf2016,
author = {Wolf, D. },
title= {Late-life disability trends and trajectories},
year = {2016},
doi = {10.1016/B978-0-12-417235-7.00004-4},
editor = {George, L.K.},
editor = {Ferraro, K.F.},
booktitle = {Handbook of aging and the social sciences},
address = {London},
publisher = {Academic Press},
pages = {77--99},
}