N. . Kamilalita, E. N. . Hidayah, and Y. S. . Purnomo, “Performance of Mircoalgae Spirulina platensis in Oxidation Ditch Algae Reactor to Remove Nitrate in Domestic Wastewater”, Nusantara Sci. Tech. Proc., pp. 95–99, Nov. 2021, doi: 10.11594/nstp.2021.1415.