“Cobalt and Copper Recovery from the Ancient Flotation Tailings Using Selective Sulfation Roast - Leaching Process”. Journal of Mining and Metallurgy, Section B: Metallurgy 55, no. 3 (July 25, 2019): 315–324. Accessed June 11, 2026. https://test.aseestant.ceon.rs/index.php/jmm/article/view/20815.