@article{ref1,
title="Use of roundabouts: summary of an informational report",
journal="ITE journal",
year="1992",
author="",
volume="62",
number="2",
pages="42-45",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0162-8178",
doi="",
url="http://dx.doi.org/"
}