1. P. K. Senagin and V. S. Babkin, in: Fire Prevention [in Russian], VNIIPO MVD SSSR, Moscow (1982).
2. N. F. Astbury, H. W. West, and H. R. Hodginson, Proc. British Ceram. Soc.,21, 195 (1973).
3. S. I. Alexander and N. Taylor, Proc. British Ceram. Soc.,21, 221 (1973).
4. H. Heinrich, Schadenprisma,4, 69 (1975).