Zheng, D. (2016) “A mathematical model for distribution of calcium in silicon by vacuum directional solidification”, Journal of Mining and Metallurgy, Section B: Metallurgy, 52(2), pp. 157–162. Available at: https://test.aseestant.ceon.rs/index.php/jmm/article/view/7248 (Accessed: 20 September 2026).