@article{Martikainen2001,
author = {Martikainen, P. and Mäkelä, P. and Koskinen, S. and Valkonen, T.},
title= {Income differences in mortality: a register-based follow-up study of three million men and women},
year = {2001},
doi = {10.1093/ije/30.6.1397},
journal = {International Journal of Epidemiology},
volume = {30},
number = {6},
pages = {1397--1405},
}