@article{ref1,
title="Traffic Control by Light Signals",
journal="British medical journal: BMJ",
year="1934",
author="Brown, WWK",
volume="2",
number="3837",
pages="141-141",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}