@article{ref1,
title="Sir Isaac Newton: mad as a hatter",
journal="Science",
year="1981",
author="Broad, W. J.",
volume="213",
number="4514",
pages="1341-2, 1344",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0036-8075",
doi="",
url="http://dx.doi.org/"
}