1. H. A. Lorentz:The Theory of Electrons, 2nd edition (New York, N. Y., 1952);J. D. Jackson:Classical Electrodynamics (New York, N. Y., 1962).
2. See, for example:P. A. M. Dirac:Proc. Roy. Soc., A167, 148 (1938);J. A. Wheeler andR. P. Feynman:Rev. Mod. Phys.,17, 157 (1945);J. Cohn:Am. Journ. Phys.,35, 949 (1967).
3. I. Prigogine andB. Leaf:Physica,25, 1067 (1959);I. Prigogine andF. Henin:Physica,27, 982 (1961).
4. See the review byT. Erber:Fort. der Phys.,9, 343 (1961), for a rather full account of many of these attempts.
5. See ref. (1,4)H. A. Lorentz:The Theory of Electrons, 2nd edition (New York, N. Y., 1952);J. D. Jackson:Classical Electrodynamics (New York, N. Y., 1962). See the review byT. Erber:Fort. der Phys.,9, 343 (1961), for a rather full account of many of these attempts.