PANDEY, P.; DWIVEDI, S. Study of Projection of Annual Output, Ownership Cost, Operating Cost and Cost Per Tonne of Coal Exposed by Dragline. Journal of Mines, Metals and Fuels, [S. l.], v. 64, n. 11, p. 568–571, 2022. Disponível em: https://informaticsjournals.com/index.php/jmmf/article/view/31611. Acesso em: 22 jul. 2024.