Ali Abd-Alameer, Maha. 2009. “Identifying Tannin Compounds in Black Tea Extract Camellia Sinensis and the Effect of Temperature on the Amount of Protein Precipitant Tannin”. University of Thi-Qar Journal of Science 1 (4): 51-57. https://jsci.utq.edu.iq/index.php/main/article/view/221.