Imran, Ali, Masood Sadiq Butt, Mian Kamran Sharif, and Javed Iqbal Sultan. “Chemical Profiling of Black Tea Polyphenols”. Pakistan Journal of Nutrition 12, no. 3 (February 15, 2013): 261–267. Accessed August 18, 2025. https://pjnonline.org/pjn/article/view/1814.