“REDUCTIVE-SULFURIZING SMELTING TREATMENT OF SMELTER SLAG FOR COPPER AND COBALT RECOVERY”. Journal of Mining and Metallurgy, Section B: Metallurgy 54, no. 1 (December 28, 2017): 73–79. Accessed June 11, 2026. https://test.aseestant.ceon.rs/index.php/jmm/article/view/10487.