Nguyễn Văn, T., Tran Hung Thuan and Do Quang Trung 2022. Research on enhancing the mechanical strength of polyvinyl alcohol/sodium alginate gel beads applied in biological wastewater treatment . Journal of Military Science and Technology. 78 (Apr. 2022), 93–100. DOI:https://doi.org/10.54939/1859-1043.j.mst.78.2022.93-100.