@article{ref1,
title="Present state, prospects, and problems of bicycle transportation in Japan",
journal="IATSS research",
year="1999",
author="Yamakawa, H.",
volume="23",
number="2",
pages="6-14",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0386-1112",
doi="",
url="http://dx.doi.org/"
}