Ikram K. Othman and Theia’a N. Al-Sabha , Trans., “Spectrophotometric Determination of Catecholamine Containing Drugs Using Calcon Dye”, Pak. J. Anal. Environ. Chem., vol. 23, no. 2, pp. 247–258, Nov. 2024, doi: 10.21743/pjaec/2022.12.07.