Ref.: Cabral, A.R., Lehmann, B., Grambole, D., and Herrmann, F. (2004) Hydrogen in a natural Pd-O compound from Gongo Soco, Minas Gerais, Brazil. Canadian Mineralogist: 42: 689-694.
Cabral, A.R., Lehmann, B., Kwitko, R., Jones, R.D., Pires, F.R.M., Rocha Filho, O.G., and Inncentini, M.D. (2001) Palladium-oxygenated compounds of the Gongo Soco mine, Quadrilátero FerrĂfero, central Minas Gerais, Brazil. Mineralogical Magazine: 65: 169-179.
Mineralogical Magazine: 67: 453-463; App.Earth Science: 111: 74-80; Canadian Mineralogist: 41: 473-478.