Quan, P., Hang, T., Ha, N., & Giang, B. (2007). TOTAL POLYPHENOLS, TOTAL CATECHINS CONTENT AND DPPH FREE RADICAL SCAVENGER ACTIVITY OF SEVERAL TYPES OF VIETNAM COMMERCIAL GREEN TEA. Science and Technology Development Journal, 10(10), 5-11. https://doi.org/https://doi.org/10.32508/stdj.v10i10.2827