M. A. . Pangestu, Y. A. Y. . Pracesa, and D. S. . Perwitasari, “Biosorption of Total Chrome Metals on Leather Tannery Liquid Waste Using Tofu Dregs ”, Nusantara Sci. Tech. Proc., pp. 200–204, Nov. 2020, doi: 10.11594/nstp.2020.0531.