Y.E, G.; O.O, A.; O.O, O.-O.; Y.V, A. Petrological, Chemical, and Mineralogical Characterization of Anka (Zamfara State) Manganese Ore. NanoNEXT, [S. l.], v. 2, n. 1, p. 7–12, 2021. DOI: 10.34256/nnxt2112. Disponível em: https://www.asianresassoc.org/journals/index.php/nanonext/article/view/77. Acesso em: 18 jul. 2026.