Quoc Viet Bui, Thuy Vy Phan and Tien Khoa Le 2021. Development of new homogeneous photo-Fenton catalytic systems using oxalic acid and ferric ions in very low concentrations. Vietnam Journal of Science, Technology and Engineering. 63, 3 (Sep. 2021), 8-14. DOI:https://doi.org/10.31276/VJSTE.63(3).08-14.