S. Othman, N., and عثمان. “Spectrophotometic Determination of Some Sulphonamides in Aqueous Solution Via Azo- Dye Formation Reaction”. Journal of Education and Science (JES) 17, no. 2 (June 1, 2005): 32–40. Accessed August 4, 2025. https://rjps.uomosul.edu.iq/index.php/edusj/article/view/17631.