@article{ref1,
title="The influence of negative air ions on human performance and mood",
journal="Human factors",
year="1981",
author="Berrier, J. and Galla, J. and Poole, M. F. and Tom, G.",
volume="23",
number="5",
pages="633-636",
abstract="Abstract unavailable.",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}