@article{ref1,
title="Influence of light on human circadian rhythms",
journal="Aerospace medicine",
year="1966",
author="Gerritzen, F.",
volume="37",
number="1",
pages="66-70",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}