1. E. Fitzer:Plansee Proc. 2nd Seminar, Reutte/Tyrol, 1955, Pergamon Press, London, 1956.
2. R. W. Bartlett,et al.: ASD-TDR-63-753, June, 1963.
3. O. Burisch:Ber. Deut. Keram. Ges., 1964, vol. 41, p. 120.
4. J. B. Berkowitz-Mattuck, P. E. Blackburn, and E. J. Felten:Trans. TMS-AIME, 1965, vol. 233, p. 1093.
5. J. J. Rausch and C. R. Simcoe: Armour Research Foundation, Chicago, Ill., ARF 2981-4 (Final Report), August 31, 1961.