N, A., I. F, and A. Haiyee Z. “Determination of Ascorbic Acid, Total Phenolic Content and Antioxidant Activities in Turmeric Leaves of Different Maturity Stages”. Malaysian Journal of Science, vol. 24, no. 1, Jan. 2005, pp. 89-92, http://mjs.um.edu.my/index.php/MJS/article/view/8935.