Madri, Mohammed Sahib, and Omar Saleh Hussein. “L-Tryptophan Measurement Using Spectrophotometry and Spectrofluorometry in Pharmaceutical Formulations Containing 1-Chloro-4 Nitrobenzofurazon”. American Journal of Bioscience and Clinical Integrity 2, no. 7 (July 23, 2025): 30–36. Accessed September 16, 2025. https://biojournals.us/index.php/AJBCI/article/view/1241.