Sudibyo, Sudibyo, Lilis Hermida, and Puwala Ardhana Reswari. “Optimization of Electrometal - Electrowinning Cobalt Process from the Slag of Nickel Pig Iron (NPI)”. Journal of Materials Science and Applied Energy 10, no. 2 (April 30, 2021): 49–57. Accessed April 24, 2024. https://ph01.tci-thaijo.org/index.php/jmsae_ceae/article/view/242741.