1. Sir JamesJeans:The Mathematical Theory of Electricity and Magnetism, 5th Ed. (Cambridge, 1966), p. 591.
2. H. Aspden:Physics Unified (Southampton, 1980). See bibliography references in chapt. 4.
3. J. Aharoni:The Special Theory of Relativity, 2nd. Ed. (Oxford, 1965), p. 186 and 198.
4. B. DeWitt andR. W. Brehme:Ann. Phys. (N. Y.),9, 220 (1960).
5. J. Kapusta:Nuovo Cimento B,31, 225 (1976).