1. Ramdohr, P. (1969). The Ore Minerals and their Intergrowths, Pergamon Press, Oxford, 1174pp
2. MDAT (A. R. Hölzel), Systematik in der Mineralogie, Ober-Olm, Germany: >3500 minerals, no unnamed minerals. 〈http://www.esm-software.com/mdat/〉
3. Roberts, W. L., Campbell, T. J. and Rapp, G. R. (1990). Encyclopedia of Minerals, 2nd edn. Van Nostrand Reinhold, New York, 979pp
4. Frye, K. (ed.) (1981). The Encyclopedia of Mineralogy, Hutchinson Ross, Stroudsburg, PA, 794pp
5. Povarennykh, A. S. (1966). Crystal Chemical Classification of Minerals. Naukova Dumka Press, Kiev (in Russian); Plenum Press, New York and London (1972), 2 vols., 766pp. (in English)