Blazheyevskіy M. Y., and O. V. Koval’ska. “Application of the Enzymatic Method for the Quantitative Determination of Dequalinium Chloride in Lozenges”. Journal of Organic and Pharmaceutical Chemistry, vol. 20, no. 1(77), May 2022, pp. 21-27, doi:10.24959/ophcj.22.252499.