1. P. P. Budnikov et al., The Technology of Ceramics and Refractories [in Russian], Gosstroiizdat (1962), p. 135.
2. R. Rach, Ber. Dtsch. Keram. Ges.,41, No. 1, 21 (1964).
3. W. D. Kingery, Introduction to Ceramics, Wiley, New York (1960).
4. I. G. Orlova, Sb. Nauchnykh Trudov UNIIO, No. 7 (54), 77 (1963).
5. L. Lekriveu, in: Advances in Refractories Production [Russian translation], Metallurgizdat (1962), pp. 284?296.