@article{ref1,
title="Comments on "Vigilance monitoring - review and practical aspects", by Sebastian Canisius and Thomas Penzel; Biomed Tech 2007; 52: 77-82",
journal="Biomedizinische Technik",
year="2008",
author="Wilhelm, B. J.",
volume="53",
number="3",
pages="160-1; author reply 162",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0013-5585",
doi="10.1515/BMT.2008.015",
url="http://dx.doi.org/10.1515/BMT.2008.015"
}