“Determination of Heavy Elements (Lead, Cadmium, Copper, and Iron) in Samples of Black Tea in the Libyan Market (Tripoli)”. Comprehensive Journal of Science 10, no. 39 (March 7, 2026): 1238–1244. Accessed May 12, 2026. https://www.cjos.histr.edu.ly/index.php/journal/article/view/1858.