1. Sleep regulation: Circadian rhythm and homeostasis. Current topics in neuroendocrinology;Borbely,1982
2. Normal human sleep: An overview;Carskadon,2005
3. Circadian and sleep control of hormonal secretions;Cauter,1999
4. Is sleep essential?;Cirelli;PLoS Biology,2008
5. Ontogeny of sleep and circadian rhythms;Davis,1999