@article{ref1,
title="GDL [graduated driver licensing] and Beyond: Progress and Promise",
journal="Journal of safety research",
year="2007",
author="",
volume="38",
number="2",
pages="129-129",
abstract="[Abstract unavailable]  <p>Commentary</p>  <p>Language: en</p>",
language="en",
issn="0022-4375",
doi="10.1016/j.jsr.2007.03.008",
url="http://dx.doi.org/10.1016/j.jsr.2007.03.008"
}