Sekuła, Anna, Katarzyna Brodowska, and Marzenna Więdłocha. “Determination of Total Contents of Transition Metals in Selected Granular Black Teas Marketed in Poland ”. Biotechnology and Food Science 78, no. 1 (June 30, 2014): 45-52. Accessed February 2, 2025. https://eczasopisma.p.lodz.pl/BFS/article/view/428.