@article{ref1,
title="On the variate difference method",
journal="Biometrika",
year="1923",
author="Elderton, Ethel M. and Pearson, Karl",
volume="14",
number="3-4",
pages="281-310",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0006-3444",
doi="10.1093/biomet/14.3-4.281",
url="http://dx.doi.org/10.1093/biomet/14.3-4.281"
}