Pangestu, Muhammad Aji, Yahya Ardian Yuma Pracesa, and Dyah Suci Perwitasari. “Biosorption of Total Chrome Metals on Leather Tannery Liquid Waste Using Tofu Dregs ”. Nusantara Science and Technology Proceedings (November 3, 2020): 200–204. Accessed July 23, 2025. https://nstproceeding.com/index.php/nuscientech/article/view/263.