@article{ref1,
title="The many facets of poor sleep",
journal="Neuropsychobiology",
year="1983",
author="Knab, B. and Engel-Sittenfeld, P.",
volume="10",
number="2-3",
pages="141-147",
abstract="Insomnia is a syndrome composed of symptoms of disturbed sleep, decrement of day-time performance and depressed mood to various degrees and in various combinations. This article roughly describes the methods of measuring the different facets of insomnia. A major difficulty in research with insomniacs is seen in the fact that many methods have been developed in research with young healthy volunteers, not with insomniacs. While good sleep is a homogeneous phenomenon, and its quality will be described similarly well by different methods, insomnia is a very heterogeneous syndrome with low intercorrelation of the different measures. Therefore, insomniacs' sleep quality should be assessed from as many points of view as possible.<p /><p>Language: en</p>",
language="en",
issn="0302-282X",
doi="",
url="http://dx.doi.org/"
}