@article{ref1,
title="Effective assessment of environment adaptive warning timing based on visibility of forward obstacles",
journal="Transactions of Society of Automotive Engineers of Japan",
year="2008",
author="Hiraoka, Toshihiro and Nakata, Kazuyuki and Tanaka, Masaki and Kumamoto, Hiromitsu and Saito, Hiroaki and Hatanaka, Kenichi",
volume="39",
number="1",
pages="127-132",
abstract="<p>[Abstract unavailable]</p><p>Language: ja</p>",
language="ja",
issn="0287-8321",
doi="",
url="http://dx.doi.org/"
}