@article{ref1,
title="Abuse of coffee, alcohol and nicotine",
journal="Zahnärztliche Mitteilungen",
year="1973",
author="Oelze, F.",
volume="63",
number="20",
pages="1011-1016",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-1643",
doi="",
url="http://dx.doi.org/"
}