A. A. Tawfeeq, Tahany Amir Tawfeeq, and Manal Hatem Ahmed, “Isolation, Identification, and Quantitative Evaluation of Caffeine from the Young Leaves of Green Tea (Camellia sinensis L.)”, Tikrit J. Pharm. Sci., vol. 19, no. 1, pp. 76–84, Jun. 2025.