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References

  • Budden, K. G. (1985), The Propagation of Radio Waves, Cambridge Univ. Press, New York.
  • Croft, T. A., and H. Hoogasian (1968), Exact ray calculations in a quasi-parabolic ionosphere with no magnetic field, Radio Sci., 3, 6974.
  • Kelso, J. M. (1968), Ray tracing in the ionosphere, Radio Sci., 3, 112.
  • Mikaelian, A. L. (1980), Self-focusing media with variable index of refraction, in Progress in Optics, vol. XVII, edited by E. Wolf, North-Holland, New York.
  • Nielson, D. L. (1968), Ray path equations for an ionized layer with a horizontal gradient, Radio Sci., 3, 101109.
  • Sagan, H. (1985), Introduction to the Calculus of Variations, Dover, Mineola, N. Y.
  • Wan, F. Y. M. (1995), Introduction to the Calculus of Variations and Its Applications, Chapman and Hall, New York.