HASSAN, Hassanain A.; SALIH, Miqat Hasan; ALHASSANI, Maha H. Studying the chromatographic separation of caffeine, theophylline, and theobromine. Iraqi Journal of Chemical and Petroleum Engineering, Baghdad, Iraq., v. 26, n. 2, p. 143–151, 2025. DOI: 10.31699/IJCPE.2025.2.15. Disponível em: https://www.ijcpe.uobaghdad.edu.iq/index.php/ijcpe/article/view/1377. Acesso em: 4 jul. 2025.