Baslayici, Serkan, et al. “HYDROMETALLURGICAL NICKEL AND COBALT PRODUCTION FROM LATERITIC ORES: OPTIMIZATION AND COMPARISON OF ATMOSPHERIC PRESSURE LEACHING AND PUG-ROAST-LEACHING PROCESSES: HYDROMETALLURGICAL NICKEL AND COBALT PRODUCTION”. Acta Metallurgica Slovaca, vol. 27, no. 1, Feb. 2021, pp. 17-22, doi:10.36547/ams.27.1.740.