1. Dynamics of EEG slow wave activity during physiological sleep and after administration of benzodiazepine hypnotics;Achermann;Hum. Neurobiol.,1987
2. Sleep duration and the power spectral density of the EEG;Åkerstedt;Electroenceph. clin. Neurophysiol.,1986
3. Diurnal and nocturnal sleep stage patterns following sleep deprivation;Berger;Psychol. Sci.,1971
4. A two process model of sleep regulation;Borbély;Hum. Neurobiol.,1982
5. Human sleep: its duration and organization depend on its circadian phase;Czeisler;Science,1980