@article{ref1,
title="Influence of heat exposure on productivity",
journal="Work, environment, health",
year="1974",
author="Axelson, O.",
volume="11",
number="2",
pages="94-99",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0300-3221",
doi="",
url="http://dx.doi.org/"
}