@article{Matthews2005,
author = {Matthews, R.J. and Smith, L.K. and Hancock, R.M. and Jagger, C. and Spiers, N.A.},
title= {Socioeconomic factors associated with the onset of disability in older age: A longitudinal study of people aged 75 years and over},
year = {2005},
doi = {10.1016/j.socscimed.2005.02.007},
journal = {Social Science and Medicine},
volume = {61},
number = {7},
pages = {1567--1575},
}