@article{ref1,
title="Study of nitrogen balance and creatine and creatinine excretion during recumbency and ambulation of five young adult human males",
journal="Aerospace medicine",
year="1973",
author="Mack, P. B. and Montgomery, K. B.",
volume="44",
number="7",
pages="739-746",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}