Hoai Linh, Nguyen, Ngo Kim Chi, Tran Le Minh, Dang Ngoc Phuong, Nguyen Xuan Tung, Do Thuy Tien, and Pham Thi Hong Minh. 2024. “Biochar of Post-Extraction Coffee Bean Ground As Materials for Ammonium Adsorption”. Vietnam Journal of Science and Technology 62 (2). Hanoi, VN:324-34. https://doi.org/10.15625/2525-2518/17989.