@article{ref1,
title="Some observables about load-stones, and sea-compasses",
journal="Philosophical transactions of the Royal Society of London (1665)",
year="1666",
author="",
volume="2",
number="23",
pages="423-424",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0370-2316",
doi="",
url="http://dx.doi.org/"
}