1. A. Goldhaber and M. Nieto,Rev. Mod. Phys. 43, 277 (1971);PRL 26, 1390 (1971).
2. J. Stratton,Electromagnetic Theory (McGraw-Hill, 1941), pp. 131?137, 434?437.
3. E. Whittaker,History of the Theories of Aether and Electricity, (Cambridge, 1951), p. 57.
4. H. A. Lorentz,Theory of Electrons (Dover, 1952), p. 219.
5. L. M. Milne-thomson,Theoretical Hydrodynamics (Macmillan, 1968), Chapters 13, 19.