S. Othman, N., نبیل, S. Ali Omer, and شیلان. “Spectrophotometric Determination of Bromhexine Hydrochloride by Azo-Dye Formation Reaction”. Journal of Education and Science (JES), vol. 22, no. 1, Mar. 2009, pp. 19-31, doi:10.33899/edusj.2009.57438.