O. V. Kovalska, M. Y. Blazheyevskiy, and V. V. Diadchenko, “The Use of Tetramethylbenzidine as an Indicator in the Enzymatic Quantitative Determination of Ethonium”, J. Org. Pharm. Chem., vol. 22, no. 4, pp. 36–42, Dec. 2024.