Morimoto, N.; Fabries, J.; Ferguson, A.K.; Ginzburg, I.V.; Ross, M.; Seifeit, F.A.; Zussman, J. (1989). "Nomenclature of pyroxenes"(PDF). Canadian Mineralogist. 27: 143–156. Archived from the original(PDF) on 9 March 2008.
Morimoto, N.; Fabries, J.; Ferguson, A.K.; Ginzburg, I.V.; Ross, M.; Seifeit, F.A.; Zussman, J. (1989). "Nomenclature of pyroxenes"(PDF). Canadian Mineralogist. 27: 143–156. Archived from the original(PDF) on 9 March 2008.