1. Bondarenko, L.A., Seasonal features of the effect of epithalamin on the development of the night maximum of melatonin in old rats, Probl. Stareniya Dolgoletiya, 1993, vol. 3, no. 2, pp. 97–100.
2. Goncharova, N.D., Khavinson, V.Kh., and Lapin, B.A., Pineal’naya zheleza i vozrastnaya patologiya (mekhanizmy i korrektsiya) (Pineal Gland and Age-Related Pathology: Mechanisms and Correction), St. Petersburg: Nauka, 2007.
3. Ermachenkov, M.N., Gulyaev, A.V., Arutyunyan, A.V., Milyutina, Yu.P., and Anisimov, V.N., Age-related changes in 6-hydroxymelatonin sulfate excretion in patients with gastric and colorectal cancer, Adv. Gerontol., 2013, vol. 3, no. 2, pp. 148–153.
4. Kvetnaia, T.V., Knyaz’kin, I.V., and Kvetnoi, I.M., Melatonin-neiroimmunoendokrinnyi marker vozrastnoi patologii (Melatonin as the Neuroimmune Endocrine Marker of Age-Related Pathology), St. Petersburg: DEAN, 2005.
5. Korkushko, O.V., Lapin, B.A., Goncharova, N.D., et al., Normalizing effect of epiphysis peptides on the daily content of melatonin in old monkeys and elderly people, Usp. Gerontol., 2007, vol. 20, no. 1, pp. 74–85.