@article{ref1,
title="Principles of circadian rhythms in men, studied by the effects of a weak alternating electric field",
journal="Pflügers Archiv",
year="1968",
author="Wever, R.",
volume="302",
number="2",
pages="97-122",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0031-6768",
doi="",
url="http://dx.doi.org/"
}