1. BarutA.O. and RaçzkaR., Nuovo Cimento 13B, 19 (1976).
2. For the classical relativistic theory cf. Grot, R.A. and Eringen, A.C., Int. J. Eng. Sc. 4, 611B (1966).
3. GoldenblatI.I., Nonlinear Problems of Elasticity Theory, in Russian, Moscow, Nauka, 1969.
4. BarutA.O., Electrodynamics and Classical Theory of Fields and Particles, Macmillan, N.Y., 1964, Ch. 3, §6.
5. IdinM.A., Prikladnaja Matem. and Mech. 30, 531 (1966).