1. K. Lepere and Z. Keramisch,26, No. 10, 580?582 (1974).
2. H. Ota and A. Nisikara, Taikabutsu,41, No. 6, 31?37 (1989).
3. E. H. Sabe, Ya. Hayasi, and E. Agiba, Taikabutsu,41, No. 6, 304?316 (1989).
4. V. G. Sloushch, G. M. Kushnirskii, and A. R. Nikolaev, New Developments in the Production and Control of Refractories Quality [in Russian], Collection of Papers, Minchermet, USSR, Moscow (1988), pp. 27?29.
5. V. G. Sloushch, Developing New, Effective Refractories for Advanced Metallurgical Processes [in Russian], Sci.-Tech. Seminar Proc., Chelyabinsk (1989), p. 70.