Walker, M. & Brakefield, T. & Morgan, A. & Hobson, J. & Stickgold, R. (2002). Practice with sleep makes perfect: sleep-dependent motor skill learning. Neuron 35 (1): 205–211.
18. Guzman-Marin, R. et al. (2008). Rapid eye movement sleep deprivation contributes to reduction of neurogenesis in the hippocampal dentate gyrus of the adult rat. Sleep 31 (2): 167–175.
19. Roffwarg, H. & Muzio, J. & Dement, W. (1966). Ontogenetic development of the human sleep-dream cycle. Science 152 (3722): 604–619.
20. Ellenbogen, J. & Payne, J. & Stickgold R. (2006). The role of sleep in declarative memory consolidation: passive, permissive, active or none? Current Opinion Neurobiology 16 (6): 716–722.
21. Wagner, U. & Gais, S. & Haider, H. & Verleger, R. & Born, J. (2004). Sleep inspires insight. Nature 427 (6972): 352–355.
22. Duffy, J. & Czeisler, C. (2009). Effect of Light on Human Circadian Physiology. Sleep Medicine Clinics 4 (2): 165–177.
23. Czeisler, C. et al. (1995). Suppression of melatonin secretion in some blind patients by exposure to bright light. The New England Journal of Medicine 332 (1): 6–11.
24. Utiger, R. (1992). Melatonin — The Hormone of Darkness. New England Journal of Medicine 327 (19): 1377–1379.
25. Wurtman, R. (2000). Age-related decreases in melatonin secretion-clinical consequences. The Journal of Clinical Endocrinology and Metabolism 85 (6): 2135–2136.
26. Falchi, F. & Cinzano, P. & Elvidge, C. & Keith, D. & Haim, A. (2011). Limiting the impact of light pollution on human health, environment and stellar visibility. Journal of Environmental Management 92 (10): 2714–2722.
27. Gellene, D. (2009). Sleeping pill use grows as economy keeps people up at night. Los Angeles Times (March 30, 2009).
28. Chevalier, G. & Sinatra, S. & Oschman, J. & Sokal, K. & Sokal, P. (2012). Earthing: health implications of reconnecting the human body to the Earth’s surface electrons. Journal of Environmental and Public Health 2012: 291541.
29. Zanobetti, A. et al. (2010). Associations of PM10 with sleep and sleepdisordered breathing in adults from seven U.S. urban areas. American Journal of Respiratory and Critical Care Medicine 182 (6): 819–825.