Quan, Nguyen Truong, Tam, Vo Thi Thanh, Ha, Cao The, Chieu, Le Van, AND Hai, Tran Manh. " The Dependence of Removal Rate and Efficiency on COD Loading Rate in Two Anaerobic Systems Treating High Organic Suspended Wastewater" VNU Journal of Science: Earth and Environmental Sciences [Online], Volume 35 Number 1 (26 March 2019)