“Beneficiation of Ferruginous Manganese Ore of Um Bogma Locality, Sinai: Comparison Between Conventional Reduction Roasting Techniques and Microwave Technology ”. Rudarsko-geološko-naftni zbornik 39, no. 5 (November 25, 2024): 89–100. Accessed August 24, 2025. https://ojs.srce.hr/index.php/rgn/article/view/30134.