@article{ref1,
title="Earthquake alarm system for japan railways",
journal="Japanese railway engineering",
year="1989",
author="Nakamura, Yukako",
volume="28",
number="4",
pages="1-7",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0448-8938",
doi="",
url="http://dx.doi.org/"
}