“LEACHING OF A Cu-Co ORE FROM CONGO USING SULPHURIC ACID-HYDROGEN PEROXIDE LEACHANTS”. Journal of Mining and Metallurgy, Section B: Metallurgy, vol. 49, no. 1, June 2013, p. 1, https://test.aseestant.ceon.rs/index.php/jmm/article/view/1337.