1. A. I. Spitsyn, Zh. Tekh. Fiz. 63(4), 145 (1993) [Tech. Phys. 38, 337 (1993)].
2. A. I. Spitsyn, Zh. Tekh. Fiz. 63(12), 1 (1993) [Tech. Phys. 38, 1037 (1993)].
3. S. Gavil, A. Mor, and M. Weinstein, J. Franklin Inst. 325, 595 (1988).
4. L. D. Landau and E. M. Lifshitz, Electrodynamics of Continuous Media, 1st ed., Pergamon Press, Oxford (1960), 531 pp.