@article{ref1,
title="Multivariate analysis of categorical data with applications to road safety research",
journal="Accident analysis and prevention",
year="1969",
author="Koornstra, Matthijs J.",
volume="1",
number="3",
pages="217-221",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0001-4575",
doi="",
url="http://dx.doi.org/"
}