@article{ref1,
title="Older drivers' accident risk: conceptual and methodological issues",
journal="Accident analysis and prevention",
year="1998",
author="Hakamies-Blomqvist, Liisa",
volume="30",
number="3",
pages="293-297",
abstract="Abstract unavailable.",
language="en",
issn="0001-4575",
doi="",
url="http://dx.doi.org/"
}