@article{ref1,
title="Some earthquakes warn that they are about to strike",
journal="Science",
year="2013",
author="Kerr, Richard A.",
volume="341",
number="6142",
pages="117-118",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0036-8075",
doi="10.1126/science.341.6142.117",
url="http://dx.doi.org/10.1126/science.341.6142.117"
}