1. D. APELIAN,Mater. Res. Soc. Symp. Proc. 30 (1983) 91.
2. V. J. GADGIL and V. R. RAMESH,Tool, Alloy Steels 21 (1987) 384.
3. J. ILAVSKY, K. NEUFUSS and P. CHRASKA, in Proceedings of the 5th Conference on Aluminium Oxide, Prague, August, 1990, (Centre of Materials Science, Prague Institute of Chemical Technology, 1990) p. 65.
4. V. I. KOSTIKOV and JU. A. SHESTERIN, ?Plasma coatings? (Metallurgy, Moscow, 1978).
5. S. SAFAI and H. HERMAN,Thin Solid Films 45 (1977) 295.