Koval’ska, O.V., Blazheyevskіy M.Y. and Diadchenko, V.V. 2021. The determination of the cholinesterase activity using 3,3′,5,5′-tetramethylbenzidine as an indicator. Journal of Organic and Pharmaceutical Chemistry. 19, 3(75) (Oct. 2021), 34–39. DOI:https://doi.org/10.24959/ophcj.21.240776.