1. L. I. Schiff, Proc. Nat. Acad. Sci. 46: 871 (1960); also Phys. Rev. Lett. 4: 215 (1960).
2. A recent summary of key GP-B technologies and the current state of their development can be found in D. Bardas, et al., in: “Proceedings of the Sixth Marcel Grossman Meeting on General Relativity,” H. Sato and T. Nakamura, ed., World Scientific Press, Singapore (1992), p. 382.
3. A more detailed discussion of the GP-B gyro design and fabrication can be found in J. P. Turneaure, et al., Adv. Space Res. 9: 29 (1989) and references therein.
4. F. London, “Superfluids, Vol. 1: Macroscopic Theory of Superconductivity,” Dover, New York (1961).
5. J. M. Lockhart, Proc. SPIE 619: 148 (1986).