@article{ref1,
title="Study on Medium-Short Term Earthquake Forecast in Yunnan Province by Precursory Events",
journal="Acta seismologica sinica. English edition",
year="2004",
author="Qin, JZ and Qian, XD",
volume="17",
number="2",
pages="152-",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="1000-9116",
doi="",
url="http://dx.doi.org/"
}