@article{Balfour2002,
author = {Balfour, J.L. and Kaplan, G.A. },
title= {Neighborhood environment and loss of physical function in older adults: evidence from the Alameda County Study},
year = {2002},
doi = {10.1093/aje/155.6.507},
journal = {American Journal of Epidemiology },
volume = {155},
number = {6},
pages = {507−515},
}