@article{ref1,
title="On a Difference in the Metabolism of the Sexes",
journal="American journal of sociology",
year="1897",
author="Thomas, William I.",
volume="3",
number="1",
pages="31-63",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0002-9602",
doi="10.1086/210686",
url="http://dx.doi.org/10.1086/210686"
}