@article{Martelin1998,
author = {Martelin, T. and Koskinen, S. and Valkonen, T.},
title= {Sociodemographic mortality differences among the oldest old in Finland},
year = {1998},
doi = {10.1093/geronb/53B.2.S83},
journal = {The Journals of Gerontology: Series B},
volume = {53B},
number = {2},
pages = {S83--S90},
}