@article{ref1,
title="Study on Growing Correlation Length Prior to the Earthquakes Occurred in Gansu Province and Its Nearby Area",
journal="Acta seismologica sinica. English edition",
year="2004",
author="Rong, DL and Li, Yan-ru and Liu, X. Z.",
volume="17",
number="5",
pages="564-",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="1000-9116",
doi="",
url="http://dx.doi.org/"
}