1. S. A. Nemnonov, Fiz. Met. Metallov.,19, 550 (1965).
2. S. A. Nemnonov, Some Problems of Transition-Metal Electron Structure [in Russian], Izd. Inst. Met. Fiz., AN UkrSSR, Kiev (1968), p. 83.
3. I. Z. Dekhtyar and V. V. Nemoshkalenko, Electron Structure and Electron Properties of Transition Metals and Their Alloys [in Russian], Naukova Dumka, Kiev (1971), pp. 223?225.
4. J. C. Ho and E. W. Collings, Phys. Lett.,29-A, 206 (1969).
5. L. E. Toth, Transition Metal Carbides and Nitrides, Academic Press, New York (1971).