1. T. F. Jordan andC. S. Shukre:Phys. Rev. D,5, 799 (1972).
2. See, for example,C. Möller:The Theory of Relativity, 2 edition, Chapt. 6 and 7 (Oxford, 1972).
3. F. Rohrlich:Classical Charged Particles, subsect.6 .3 (Reading, Mass., 1965).
4. A. D. Fokker:time and Space, Weight and Inertia, Chapt. VII, sect.5 (London, 1965).
5. A. Gamba:Am. J. Phys.,35, 83 (1967).