Kenzhaliyev, Bagdaulet, et al. “The Pre-Bio-Oxidation and Its Effect on the Leaching Process of Low-Grade Copper Ore in Percolation Columns”. Acta Metallurgica Slovaca, vol. 31, no. 2, May 2025, pp. 129-33, doi:10.36547/ams.31.2.2214.