1. A. N. Minkevich, Chemicothermal Treatment of Metals and Alloys [in Russian], Mashinostroenie, Moscow (1965).
2. H. Schenk et al., Arch. Eisenhüttenw., No. 2 (1960).
3. K. Norita, Crystal Structure of Nonmetallic Inclusions in Steel [in Russian], Metallurgiya, Moscow (1969).
4. Oxidation of Metals [in Russian], Vol. 1, Metallurgiya, Moscow (1968).
5. J. Tallot, Thesis, Publ. IRSTS, Ser. A. No. 137, Paris (1956).