@article{ref1,
title="Commentary on "Elderly and Disabled Travelers: Intelligent Transport Systems Designed for the 3rd Millennium"",
journal="Transportation human factors",
year="1999",
author="Campbell, J. L.",
volume="1",
number="2",
pages="135-139",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="1093-9741",
doi="10.1207/sthf0102_2",
url="http://dx.doi.org/10.1207/sthf0102_2"
}