1. Comparison study of actigraphic, polysomnographic, and subjective perception of sleep parameters;CHANG;Sleep,1992
2. Seasonal effects on sleep;WHITE,1975
3. An analytical study of children's sleep;ERWIN;Journal of Genetic Psychology,1934
4. The sleep-wakefulness pattern in the Arctic;KLEITMAN;Scientific Monthly,1953
5. Sleep habits of healthy young adults: use of a sleep questionnaire;JOHNS;British Journal of Preventive and Social Medicine,1971