1. Ye. V. Baklanov, B. Ya. Dubetsky and V. P. Chebotayev, App.’, Phys. 9, 171 (1976).
2. C. J. Bordé, Proc. of 1977 Laser Spectroscopy Conference, in Laser Spectroscopy III (Springer-Verlag, 1977), p. 121, and references therein.
3. J. C. Bergquist, S. A. Lee and J. L. Hall, Phys. Rev. Lett. 38, 159 (1977).
4. J. C. Bergquist, High Resolution Optical Spectroscopy: Optical Ramsey Fringes; Neon Isotope and Hyperfine Studies (PhD thesis, University of Colorado, Boulder, Colorado, 1978 ).
5. J. C. Bergquist, S. A. Lee and J. L. Hall, Proc. of 1977 Laser Spectroscopy Conference, in Laser Spectroscopy III (Springer-Verlag, 1977 ), p. 142.