Taufen, P. M., and T. L. Brenner. “GEOCHEMICAL ORIENTATION SURVEY OF THE FORTALEZA DE MINAS O’TOOLE Ni DEPOSIT SOUTHWESTERN MINAS GERAIS, BRAZIL”. Geochimica Brasiliensis, vol. 1, no. 1, Apr. 2011, pp. 1-18, https://geobrasiliensis.org.br/geobrasiliensis/article/view/1.