1. M. J. POTTER: 'Kyanite and related minerals', U.S. Geological Survey, Mineral Commodity Summaries, February, 2000, 94-95.
2. B. J. BENNETT and J. E. CASTLE: 'Kyanite and related minerals', In industrial minerals and rocks', 5th edn, 1985, 729-736.
3. E. M. DICKSON: 'Sillimanite minerals', In Synthetics Encroaching on Markets, Industrial Minerals, 1981, 95-105.