@article{ref1,
title="The energetic cost of moving about",
journal="American scientist",
year="1975",
author="Tucker, V. A.",
volume="63",
number="4",
pages="413-419",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0003-0996",
doi="",
url="http://dx.doi.org/"
}