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2. J. H. van Fleck, Theory of Electric and Magnetic Susceptibilities (Clarendon, Oxford, 1932), pp. 113, 279.
3. L. D. Landau and E. M. Lifshitz, Course of Theoretical Physics, Vol. 5: Statistical Physics: Part 1) (Fizmatlit, Moscow, 1951; Butterworth-Heinemann, Oxford, 1959).
4. A. V. Shubnikov, Symmetry and Antisymmetry of Finite Groups (Academy of Sciences of the Soviet Union, Moscow, 1951) [in Russian].
5. D. N. Astrov, Sov. Phys. JETP 11, 708 (1960).