@article{ref1,
title="Present situation and future problems of safety measures for level- crossings in japan",
journal="Japanese railway engineering",
year="1993",
author="Sugitani, Hideki",
volume="",
number="",
pages="-",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0448-8938",
doi="",
url="http://dx.doi.org/"
}