@article{ref1,
title="Access, aging, and impairments part A: impairments and behavioral responses",
journal="Journal of transport and land use",
year="2009",
author="Schmocker, Jan-Dirk",
volume="2",
number="1",
pages="1-2",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="1938-7849",
doi="",
url="http://dx.doi.org/"
}