@article{ref1,
title="Variability of PCO2 breath-by-breath in normal man",
journal="Advances in experimental medicine and biology",
year="2003",
author="Wolff, Christopher B. and Hong, Durumee",
volume="540",
number="",
pages="25-29",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0065-2598",
doi="",
url="http://dx.doi.org/"
}