1. 1. A. Einstein, in Scientific Papers Presented to Max Born (Oliver and Boyd, Edinburg, London, 1953), pp. 33–40. M. Born, Kg. Dnsk. Vid. Selsk. Mat. Medd. 30, 1 (1955). M. Born and W. Ludwig, Z. Phys. 150, 106 (1958). L. de Broglie, Non-linear Wave Mechanics, A Causal Interpretation (Elsevier, Amsterdam, 1960), p. 136. L. S. Brown, Am. J. Phys. 40, 371 (1972). D. Home and S. Sengupta, Am. J. Phys. 51, 265 (1983). G. G. Cabrera, and M. Kiwi, Phys. Rev. A 36, 2995 (1987).
2. 2. A. Einstein, in The Born-Einstein Letters (Macmillan, London, 1971), p. 208.
3. 3. W. Pauli, in The Born-Einstein Letters (Macmillan, London, 1971), p. 208.
4. 4. D. Home, Conceptual Foundations of Quantum Physics (Plenum, New York, 1997).
5. 5. H. W. Lee, Phys. Rep. 259 147–211 (1995). M. Hillery, R. F. O'Conell, M. O. Scully, and E. P. Wigner, Phys. Rep. 106, 121–167 (1984).