Robust Regression Analysis of Full Overlapping Caffeine and Pyridoxine HCl UV-Vis Spectra in Pharmaceutical Tablet. Mal. J. Fund. Appl. Sci. [Internet]. 2023 Aug. 27 [cited 2026 Sep. 14];19(4):539-52. Available from: https://mjfas.utm.my/index.php/mjfas/article/view/2918