B. T. U. Uyen, D. K. Ngan, N. N. Huy, N. T. H. Hai, N. H. Trieu, and N. T. Thuy, “Application of response surface methodology for optimization of phosphate and ammonia removal from domestic wastewater by modified steel slag”, SEHS, vol. 18, p. 24020009, Dec. 2024.