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2. D. V. Sivukhin, “On the Electromagnetic Field Energy in Dispersive Media,” Opt. Spektrosk. 3, 308–312 (1957).
3. V. K. Agranovich and V. L. Ginzburg, Crystallooptics with Regard to Spatial Dispersion and the Theory of Excitons (Nauka, Moscow, 1965) [in Russian].
4. V. G. Veselago, “Electrodynamics of Substances with Simultaneously Negative Values of ɛ and μ,” Usp. Fiz. Nauk 92, 517 (1967).
5. Electrophysical Properties of Percolation Systems, Ed. by A.N. Lagar’kova (IVTAN, Moscow, 1990) [in Russian].