Taufen, P. M., and T. L. Brenner. 2011. “GEOCHEMICAL ORIENTATION SURVEY OF THE FORTALEZA DE MINAS O’TOOLE Ni DEPOSIT SOUTHWESTERN MINAS GERAIS, BRAZIL”. Geochimica Brasiliensis 1 (1):1-18. https://geobrasiliensis.org.br/geobrasiliensis/article/view/1.