1. RF Emslie, Prec. Res., 7, 61, 1978.
2. R.F. Emslie, Geol. Surv. Can. Bull.,293, 136 p., 1980.
3. LD Ashwal and KE Seifert, Geol. Soc. Am. Bull., 91, Pt. II 659, 1980.
4. S.A. Morse, Am. Min., 67, 1087, 1982.
5. J.-C. Duchesne, in: Feldspars and Feldspathoids, ed. by W.L. Brown, NATO ASI in Rennes, France, 1984, p. 411.