@article{ref1,
title="Variability and fixed-point speed measurements",
journal="Traffic safety research review",
year="1960",
author="Schumate, R. P. and Crowther, Richard F.",
volume="4",
number="1",
pages="12-15",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0564-0741",
doi="",
url="http://dx.doi.org/"
}