@article{ref1,
title="Cyclists complicate urban traffic in the netherlands",
journal="Traffic quarterly",
year="1948",
author="Ramaker, J.g.",
volume="2",
number="2",
pages="193-203",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0041-0713",
doi="",
url="http://dx.doi.org/"
}