@article{ref1,
title="Traffic supervision (10)",
journal="Traffic digest and review",
year="1955",
author="Kreml, Franklin Martin and Larsen, George",
volume="",
number="",
pages="-",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0041-0667",
doi="",
url="http://dx.doi.org/"
}