@article{ref1,
title="Science and graduated licensing",
journal="Journal of safety research",
year="2007",
author="Williams, Allan F.",
volume="38",
number="2",
pages="131-131",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0022-4375",
doi="10.1016/j.jsr.2007.03.005",
url="http://dx.doi.org/10.1016/j.jsr.2007.03.005"
}