“Two-stage leaching of germanium from copper cake under subsequent non-oxidizing and oxidizing conditions” (2025) Journal of Mining and Metallurgy, Section B: Metallurgy, 61(1), pp. 59–70. Available at: https://test.aseestant.ceon.rs/index.php/jmm/article/view/55199 (Accessed: 11 June 2026).