@article{ref1,
title="Effects of prolonged bed rest on EEG sleep patterns in young, healthy volunteers",
journal="Electroencephalography and clinical neurophysiology",
year="1971",
author="Ryback, R. S. and Lewis, O. F.",
volume="31",
number="4",
pages="395-399",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0013-4694",
doi="",
url="http://dx.doi.org/"
}