1. N. C. Ciocea, V. Bertalan, Fl. Michalache, and C-tin Barbaresso, “Mullite refractory castables with low and ultra-low cement content,” Eng. Mater., 132-136, 1806–1809 (1977) (Trans. Tech. Publication, Switzerland, 1997).
2. Patent granted. Application No. 2004123470/03 (025290) as of July 30, 2004.