@article{ref1,
title="Occupancy classification",
journal="Fire technology",
year="1989",
author="Watts, John M.",
volume="25",
number="2",
pages="97-98",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0015-2684",
doi="10.1007/BF01041419",
url="http://dx.doi.org/10.1007/BF01041419"
}