@article{ref1,
title="A mathematical model for ionization-type smoke detectors and the reduced source approximation",
journal="Fire technology",
year="1977",
author="Litton, Charles D.",
volume="13",
number="4",
pages="266-281",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0015-2684",
doi="10.1007/BF02319725",
url="http://dx.doi.org/10.1007/BF02319725"
}