@article{ref1,
title="An analysis of human factors in traffic accidents using variation tree method",
journal="Transactions of Society of Automotive Engineers of Japan",
year="1999",
author="Ishida, Toshiro",
volume="30",
number="2",
pages="125-130",
abstract="<p>[Abstract unavailable]</p><p>Language: ja</p>",
language="ja",
issn="0287-8321",
doi="",
url="http://dx.doi.org/"
}