R. E. Tarigan, N. Sajida, and C. Surbakti, “Advanced UV Spectrophotometry-Classical Least Squares Determination of Paracetamol, Phenylpropanolamine HCl, and Chlorpheniramine Maleate in Tablet Dosage Form ”, International Journal of Science, Technology & Management, vol. 5, no. 4, pp. 985-990, Jul. 2024.