Zhang, Zhongtang, Weifeng Li, and Jing Zhan. “EFFECT OF COAL RATIO ON THE HIGH-LEAD SLAG REDUCTION PROCESS”. Journal of Mining and Metallurgy, Section B: Metallurgy 54, no. 2 (September 1, 2018): 179. Accessed February 4, 2026. https://www.aseestant.ceon.rs/index.php/jmm/article/view/16150.