Uz T, Akhisaroglu M, Ahmed R, Manev H (2003). «The pineal gland is critical for circadian Period1 expression in the striatum and for circadian cocaine sensitization in mice». Neuropsychopharmacology28 (12): 2117-23. PMID12865893.
Valenzuela FJ, Torres-Farfan C, Richter HG, Méndez N, Campino C, Torrealba F, Valenzuela GJ, Serón-Ferré M. Clock gene expression in adult primate suprachiasmatic nuclei and adrenal: is the adrenal a peripheral clock responsive to melatonin?. Endocrinology. 2008 Apr;149(4):1454-61. Epub 2008 Jan 10. PMID 18187542