Panda, N. C., B. K. Sahu, A. G. Rao, and S. K. Panda. 1979. “Tannic Acid of Tea and Coffee As Incriminating Factor for Heart Disease”. The Indian Journal of Nutrition and Dietetics 16 (9):348-55. https://www.informaticsjournals.com/index.php/ijnd/article/view/12333.