@article{ref1,
title="Energy expenditure in desert walks: man and burro Equus asinus",
journal="Journal of applied physiology (APS DC)",
year="1969",
author="Yousef, M. K. and Dill, D. B.",
volume="27",
number="5",
pages="681-683",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0021-8987",
doi="",
url="http://dx.doi.org/"
}