Pulungan AF, Rosaldi H, Rani Z. Analysis of paracetamol and caffeine contents in tablet preparations using zero-crossing derivative spectrophotometry method. JPS [Internet]. 2024 Aug. 11 [cited 2024 Nov. 24];7(3):323-32. Available from: https://journal-jps.com/new/index.php/jps/article/view/489