1. Binns, R.A., Long, J.V.P., Reed, S.J.B.: Some naturally occurring members of the clinoenstatite-clinoferrosilite mineral series. Nature198, 777?778 (1963)
2. Boyd, F.R., Brown, G.M.: Electron-probe study of pyroxene exsolution. Mineral. Soc. Am. Spec. Paper2, 211?216 (1969)
3. Brown, G.M.: Pyroxenes from the early and middle stages of fractionation of the Skaergaard intrusion, East Greenland. Mineral. Mag.31, 511?543 (1957)
4. Buchanan, D.L.: The quantitative analysis of Bushveld pyroxenes. In: Developments in Electron Microscopy and Analysis. Proc. Electron Microsc. Anal. Group 75. pp. 477?480. Bristol, London: Academic 1976
5. Champness, P.E., Copley, P.A.: The transformation of pigeonite to orthopyroxene. In: Electron Microscopy in Mineralogy (H.R. Wenk, ed.), pp. 228?233. Berlin-Heidelberg-New York: Springer 1976