MAPANI, B.; FINKELMAN, R.; RAVENGAI, S. Trace and heavy element distribution of the Hwange Coals in Zimbabwe. International Science and Technology Journal of Namibia, [S. l.], p. 089–105, 2014. Disponível em: https://journals.unam.edu.na/index.php/ISTJN/article/view/1115. Acesso em: 6 may. 2024.