REYES CABALLERO, F.; PARRA VARGAS, C. A.; MARTÍNEZ OVALLE, S. A. Technological, Environmental and Economic Impact, of the Mineral Matter Presented in Coal. Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales, Bogotá, Colombia, v. 37, n. Suplemento, p. 69–74, 2024. DOI: 10.18257/raccefyn.2617. Disponível em: https://raccefyn.co/index.php/raccefyn/article/view/2617. Acesso em: 18 may. 2024.