Assessment of using shungite rock technological feasibility in the production of manganese agglomerate . Modern Problems of Metallurgy, [S. l.], n. 25, p. 60–74, 2022. DOI: 10.34185/1991-7848.2022.01.05. Disponível em: https://journals.nmetau.edu.ua/index.php/mpm/article/view/1019.. Acesso em: 15 mar. 2026.