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Coates, Paul M. (2005). Encyclopedia of Dietary Supplements. Marc R. Blackman, Gordon M. Cragg, Mark Levine, Joel Moss, Jeffrey D. White. CRC Press. str. 457–466. ISBN0824755049. Pristupljeno 31. 3. 2009.
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Filadelfi AM, Castrucci AM (May 1996). „Comparative aspects of the pineal/melatonin system of poikilothermic vertebrates”. Journal of Pineal Research20 (4): 175–86. DOI:10.1111/j.1600-079X.1996.tb00256.x. PMID8836950.
Sugden D, Davidson K, Hough KA, Teh MT (October 2004). „Melatonin, melatonin receptors and melanophores: a moving story”. Pigment Cell Research17 (5): 454–60. DOI:10.1111/j.1600-0749.2004.00185.x. PMID15357831.
Arendt, Josephine (August 2005). „Melatonin: Characteristics, Concerns, and Prospects” (Review). J Biol Rhythms (SagePub) 20 (4): 291-303. DOI:10.1177/0748730405277492. Pristupljeno 2010-10-10. »There is very little evidence in the short term for toxicity or undesirable effects in humans. The extraordinary “hype” of the miraculous powers of melatonin in the recent past did a disservice to acceptance of its genuine benefits.«
Filadelfi AM, Castrucci AM (May 1996). „Comparative aspects of the pineal/melatonin system of poikilothermic vertebrates”. Journal of Pineal Research20 (4): 175–86. DOI:10.1111/j.1600-079X.1996.tb00256.x. PMID8836950.
Sugden D, Davidson K, Hough KA, Teh MT (October 2004). „Melatonin, melatonin receptors and melanophores: a moving story”. Pigment Cell Research17 (5): 454–60. DOI:10.1111/j.1600-0749.2004.00185.x. PMID15357831.