YERBOL KENZHEGALIULY MUKHAMBETGALIYEV. HIGH-ASH COALS - POTENTIAL RESOURCES FOR FERROALLOY PRODUCTION . Academic Journal of Physical and Chemical Sciences, [S. l.], n. 3, p. 12–19, 2020. Disponível em: http://89.250.84.46/reports-science/article/view/801. Acesso em: 13 дек. 2025.