@article{ref1,
title="The effects of low concentration of carbon monoxide in man",
journal="Scandinavian journal of respiratory diseases supplementum",
year="1974",
author="Stewart, R. D.",
volume="91",
number="",
pages="56-62",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0080-6730",
doi="",
url="http://dx.doi.org/"
}