@article{ref1,
title="Uniformity of traffic control. Has it been achieved?",
journal="Traffic quarterly",
year="1961",
author="Michael, HL",
volume="15",
number="1",
pages="98-107",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0041-0713",
doi="",
url="http://dx.doi.org/"
}