Abazi, Drita, Nora Limani-Bektashi, and Olga Popovska. 2021. “Development of Thin-Layer Chromatographic Method for Determination of Caffeine in Black, Green, and White Tea”. European Journal of Chemistry 12 (3):284-88. https://doi.org/10.5155/eurjchem.12.3.284-288.2131.