@article{ref1,
title="Zusammenfassung von Robert b. voas et al., Assessing the effectiveness of minimum legal drinking age and zero tolerance laws in the united states",
journal="Blutalkohol",
year="2004",
author="Weimer-Hablitzel, M",
volume="41",
number="6",
pages="510-511",
abstract="[Abstract unavailable]  <p>DWI</p>",
language="de",
issn="0006-5250",
doi="",
url="http://dx.doi.org/"
}