@article{Duncan2002,
author = {Duncan, G.J. and Daly, M.C. and McDonough, P. and Williams, D.R.},
title= {Optimal indicators of socioeconomic status for health research},
year = {2002},
doi = {10.2105/AJPH.92.7.1151},
volume = {92},
pages = {1151‒1157},
}