1. Ford W. E. Dana's Textbook of Mineralogy Wiley New York 1957 P. 851.
2. Deer W. A. Howie R. A. and Zussman J. Rock-Forming Minerals. The Sheet Silicates. Wiley New York 1962.
3. THE SYSTEM MgO—SiO2—H2O
4. Yoder H. S. The MgO-A1203-SiO2-H20 system and related metamorphic facies. Amer. J. Sci. Bowen Memorial Vol. 569 (1952).
5. Triclinic talc and associated amphiboles from Gouverneur Mining District;Ross M.;N. Y. Am. Mineralogist.,1968