Nguyen, Hai, Nhan Nguyen, and Mai Nguyen. 2011. “COMPARATIVE STUDY ON TOTAL POLYPHENOLS, FLAVONOIDS CONTENT, AND ANTIOXIDANT ACTIVITY OF PROPOLIS FROM VIET NAM AND OTHER COUNTRIES”. Science and Technology Development Journal 14 (2), 66-74. https://doi.org/https://doi.org/10.32508/stdj.v14i2.1945.