“Robust Regression Analysis of Full Overlapping Caffeine and Pyridoxine HCl UV-Vis Spectra in Pharmaceutical Tablet”. Malaysian Journal of Fundamental and Applied Sciences 19, no. 4 (August 27, 2023): 539–552. Accessed September 14, 2026. https://mjfas.utm.my/index.php/mjfas/article/view/2918.