“Miniaturized Solid-Phase Microextraction of Caffeine in Tea Samples: Assessing the Environmental Friendliness of the Methods With the GAPI Tool”. International Journal of Biology and Chemistry 16, no. 1 (June 30, 2023): 68–77. Accessed July 29, 2026. https://ijbch.kaznu.kz/index.php/kaznu/article/view/721.