@article{ref1,
title="Combined consumption of alcohol and tobacco in adolescents",
journal="Zeitschrift für Allgemeinmedizin: ZFA",
year="1976",
author="Biener, K.",
volume="52",
number="10",
pages="512-515",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0341-9835",
doi="",
url="http://dx.doi.org/"
}