1. Aminoff G (1927) Über die Kristallstruktur von Hausmannit. Z Krist 64: 475?490
2. Boucher B, Buhl R, Perrin M (1971) Propriétés et structure magnétique de Mn3O4. J Phys Chem Solids 32: 2429?2437
3. Criddle AJ, Stanley CJ (1986) The quantitative data file for ore minerals, second edition. British Museum, London 1986
4. Embrey PG, Criddle AJ (1978) Error problems in the two-media method of deriving the optical constantsn andk from measured reflectances. Am Min 63: 853?862
5. Fleischer M, Wilcox RE, Matzko JJ (1984) Microscopic Determination of the Nonopaque Minerals. U.S. Geological Survey Bulletin 1627