@article{ref1,
title="Physical energy expenditure in long-haul cabin crew",
journal="Aerospace medicine",
year="1973",
author="Barnes, R. M.",
volume="44",
number="7",
pages="783-785",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}