1. Yaren Kayabaşi, Oytun Erbaş. Methylene blue and its importance in medicine. D. J. Med. Sci. 2020, 6(3):136-145. 2. Mot A. I., Crouch P. J. Biometals and Alzheimer’s Disease. In Biometals in Neurodegenerative Diseases Mechanisms and Therapeutics. 2017, Pages 1-17. 3. Oz M., Lorke D.E., Petroianu G.A. Methylene blue and Alzheimer’s disease. Biochem Pharmacol, (2009). 78, 927–932. doi:10.1016/j.bcp.2009.04.034 PMID:19433072 4. Daragȯ A, Sapota A. Cobalt and its inorganic compounds - calculated as Co. Basics and Methods of Work Environment Assessment. 2011;3:47–94. 5. Czarnek K., Terpiłowska S., and Siwicki A. K. Selected aspects of the action of cobalt ions in the human body. Cent Eur J Immunol.2015; 40(2): 236–242. 6. EDQM (2008). Methylthionimium chloride. In: European Pharmacopoeia. Strasbourg, France: European Directorate for the Quality of Medicines & HealthCare. 7. M.M. Raj, A. Dharmaraja, S.J. Kavitha, K. Panchanatheswaran, D.E. Lynch, Inorg. Chim. Acta 360 (2007) 1799. 8. Cannosa S., A. Bacchi, C. Graiff, P. Pelagatti, G. Predieri, A. Ienco, G. Manca, C. Mealli, Inorg. Chem. 56 (2017) 3512. 9. R.G. Pearson, Hard and Soft Acids and Bases. J. Am. Chem. Soc. 1963, 85, 22, 3533–3539.