@article{ref1,
title="Vehicle distance warning system for passenger cars",
journal="JSAE review",
year="1994",
author="Hayakawa, Hideyuki and Maruyama, Masahiro and Yabuta, S",
volume="15",
number="1",
pages="85-86",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0389-4304",
doi="",
url="http://dx.doi.org/"
}