Thanh Mai, N. T., T. B. Tram, T. T. Chien, and D. T. Vinh. “Study on Setting up the Standard for Tea Leaves in Processing of Green Tea Powder of High Quality”. Academia Journal of Biology, vol. 34, no. 2, June 2012, pp. 224-7, doi:10.15625/0866-7160/v34n2.965.