@article{ref1,
title="On the validity of inferences drawn from the fitting of Poisson and negative binomial distributions to observed accident data",
journal="Psychological bulletin",
year="1950",
author="Maritz, J. S.",
volume="47",
number="5",
pages="434-443",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0033-2909",
doi="",
url="http://dx.doi.org/"
}