New process for extracting vanadium by direct calcification using the heat of molten vanadium slag. Journal of Mining and Metallurgy, Section B: Metallurgy, [S. l.], v. 58, n. 3, p. 355–365, 2022. Disponível em: https://test.aseestant.ceon.rs/index.php/jmm/article/view/35709. Acesso em: 11 jun. 2026.