Zunita, Megawati, and Risha Diah Rhamadhani. 2021. “A Kinetic Study of Manganese Leaching from Low-Grade Psilomelane Ore by Acetic-Tannic Acid Lixiviant”. ASEAN Journal of Chemical Engineering 21 (2), 249-71. https://journal.ugm.ac.id/v3/AJChE/article/view/9197.