1. V. N. Poduraev, Cutting of Badly Machinable Materials [in Russian], Vysshaya Shkola, Moscow (1974).
2. Yu. A. Geller, Tool Steels [in Russian], Metallurgiya, Moscow (1968).
3. I. J. A. Armario and R. Ch. Brown, Machining of Metals [Russian translation], Mashinostroenie, Moscow (1977).
4. M. Kh. Shorshorov, S. I. Bulychev, and V. P. Alekhin, in: Methodological Recommendations for the Investigation of the Physicomechanical Properties of Materials by Continuous Identation [in Russian], Izd. Akad. Nauk SSSR, Moscow (1980), pp. 35?38.
5. I. G. Zedgenidze, Planning of Experiments for Investigating Multicomponent Systems [in Russian], Nauka, Moscow (1976).