“Hydrothermal leaching behavior of complex polymetallic secondary sulfide concentrate enhanced by ultrasonic” (2025) Journal of Mining and Metallurgy, Section B: Metallurgy, 61(1), pp. 27–41. Available at: https://test.aseestant.ceon.rs/index.php/jmm/article/view/51691 (Accessed: 11 June 2026).