Yan, Baijun. “A Study on Phase Equilibria in the CaO-Al2O3-SiO2-‘Nb2O5’(5 Mass Pct) System in Reducing Atmosphere”. Journal of Mining and Metallurgy, Section B: Metallurgy 49, no. 2 (July 1, 2013): 145. Accessed January 29, 2025. https://aseestant.ceon.rs/index.php/jmm/article/view/2438.