Tarigan Rida Evalina, Melya Sukma, and Lisda Rimayani Nasution, “Fourier Transform Infrared Spectrophotometry-Partial Least Square for Simultaneous Quantification of Paracetamol, Guaifenesin, Phenylpropanolamine, and Chlorpeniramine Maleate in Tablet”, Asian J Pharm Res Dev, vol. 13, no. 4, pp. 1–5, Aug. 2025.