@article{Maddox1994,
author = {Maddox, G.L. and Clark, D.O. and Steinhouser, K.},
title= {Dynamics of functional impairment in late adulthood},
year = {1994},
doi = {10.1016/0277-9536(94)90425-1},
journal = {Social Science and Medicine},
volume = {38},
number = {7},
pages = {925--936},
}