1. Pauli, M.: Theory of Relativity, p. 132. Pergamon Press, Oxford (1958)
2. Panofsky, W.K.H., Phillips, M.: Classical Electricity and Magnetism, 2nd edn. p. 287. Addison-Wesley, Reading (1962)
3. Einstein, A.: Ann. Phys. 17, 891 (1905)
4. Born, M.: Ann. Phys. 335, 1 (1909)
5. Herglotz, G.: Ann. Phys. 336, 393 (1910)