Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W. and Nichols, Monte C., red. (1995). «Topaz». Handbook of Mineralogi(PDF). Vol.II (Silica, Silicates). Chantilly, VA, US: Mineralogical Society of America. ISBN0-9622097-1-6. Henta December 5, 2011.{{cite book}}: CS1 maint: multiple names: editors list (link)