T. P. Nguyễn, X. C. Nguyễn, T. C. P. Trần, T. H. G. Nguyễn, and T. T. N. Nguyễn, “Evaluating organic matter removal efficiency in pig farm wastewater after biogas tank using a two-stage filtration system with biochar from Mimosa pigra”, hueuni-jns, vol. 134, no. 1C, pp. 147-157, Sep. 2025.