Huynh, Van Chung, and Thi Thanh Vy Dinh. “Total Phenolic Content and Antioxidant Activity Assessed Using Coffee Grounds at Daklak”. Dong Thap University Journal of Science, vol. 11, no. 2, Apr. 2022, pp. 33-38, doi:10.52714/dthu.11.2.2022.935.