Wang, Y., L. Wang, and K.-C. Chou. “Effects of CaO, MgO, Al2O3 and SiO2 on the Carbothermic Reduction of Synthetic FeCr2O4”. Journal of Mining and Metallurgy, Section B: Metallurgy, Vol. 51, no. 1, Jan. 2015, p. 17, https://aseestant.ceon.rs/index.php/jmm/article/view/6353.