@article{ref1,
title="Car following models and the fundamental diagram of road traffic",
journal="Transportation research",
year="1967",
author="Pipes, Louis A.",
volume="1",
number="1",
pages="21-29",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0041-1647",
doi="10.1016/0041-1647(67)90092-5",
url="http://dx.doi.org/10.1016/0041-1647(67)90092-5"
}