@article{ref1,
title="Tobacco smoking and physical performance",
journal="Journal of applied physiology (APS DC)",
year="1951",
author="Karpovich, P. V. and Hale, C. J.",
volume="3",
number="10",
pages="616-621",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0021-8987",
doi="",
url="http://dx.doi.org/"
}