1. L. Basano, Found. Phys., this issue, preceding paper.
2. E. Recami, Found. Phys. 8, 329 (1978); E. Recami, ed., Tachyons, Monopoles, and Related Topics (North-Holland, Amsterdam, 1978); E. Recami and R. Mignani, Nuovo Cim. 4, 209–290, 398 (1974); E. Recami and G. D. Maccarrone, Lett. Nuovo Cim. 28, 151 (1980).
3. E. Recami, in Albert Einstein 1879–1979: Relativity, Quanta and Cosmology in the Development of the Scientific Thought of A. Einstein, F. de Finis, ed. (Johnson Rep. Co., New York, 1979), Vol. 2, pp. 537–597 [also appears in Italian, in Centenario di Einstein: Astrofisica e Cosmologia, Gravitazione, Quanti e Relatività, M. Pantaleo, ed. (Giunti-Barbera, Florence, 1979), pp. 1021–1097].
4. M. Pavsic and E. Recami, Nuovo Cim. A 36, 171 (1976);46, 298 (1978).
5. M. Pavsic, E. Recami, and G. Ziino, Lett. Nuovo Cim. 17, 257 (1976); M. Pavsic and E. Recami, Nuovo Cim. A 46, 298 (1978); E. Recami, Lett. Nuovo Cim. 22, 591 (1978).