1. J. Anandan, Foundations of Physics
10, 601 (1980).
2. J. Anandan, Foundations of Physics
21, 1265 (1991).
3. Y. Aharonov, J. Anandan, and L. Vaidman, Phys. Rev. A
47, 4616 (1993); Y. Aharonov and L. Vaidman, Phys. Lett. A
178, 38 (1993); J. Anandan, Foundations of Physics Letters
6, 503 (1993).
4. J. Ehlers, F.A.E. Pirani, and A. Schild, in Papers in Honour of J.L. Synge, edited by L. O’Raifeartaigh ( Clarendon Press, Oxford, 1972 ).
5. J. Anandan in Quantum Theory and Gravitation, edited by A.R. Marlow ( Academic Press, New York, 1980 ), p. 157.