Mills, Stuart J.; Hatert, Frédéric; Nickel, Ernest H.; Ferraris, Giovanni «The standardisation of mineral group hierarchies: application to recent nomenclature proposals». European Journal of Mineralogy, 21, 5, 30-10-2009, pàg. 1073–1080. DOI: 10.1127/0935-1221/2009/0021-1994.