“Effect of MgO Content on Melting Features and Viscosity of SiO2-CaO-MgO-Al2O3-FeO Slag in Nickel Laterite Metallurgy”. 2013. Journal of Mining and Metallurgy, Section B: Metallurgy 49 (1): 9. https://test.aseestant.ceon.rs/index.php/jmm/article/view/1363.