@article{ref1,
title="A Longitudinal Comparison of Bicycle and Moped Use by University Students",
journal="Transportation quarterly",
year="1991",
author="Willey, M and Miller, D. and Papacostas, CS",
volume="45",
number="3",
pages="391-408",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0278-9434",
doi="",
url="http://dx.doi.org/"
}