1. S. A. Al’tshuler and B. M. Kozyrev, Electron Paramagnetic Resonance of Compounds of Intermediate Group Elements (Nauka, Moscow, 1972) [in Russian].
2. A. Abragam and B. Bleaney, Electron Paramagnetic Resonance of Transition Ions (Clarendon Press, Oxford, 1970; Mir, Moscow, 1972).
3. T. D. Smith and J. R. Pilbrow, Coord. Chem. Rev. 13, 173 (1974).
4. J. E. Wertz and J. R. Bolton, Electron Spin Resonance: Elementary Theory and Practical Applications (McGraw-Hill, New York, 1972; Mir, Moscow, 1975).
5. V. T. Kalinnikov and Yu. V. Rakitin, Introduction to Magnetochemistry: Method of Static Magnetic Susceptibility in Chemistry (Nauka, Moscow, 1980) [in Russian].