• Bickel, P. J., and K. A. Doksum (2001), Mathematical Statistics: Basic Ideas and Selected Topics, 2nd ed., Prentice-Hall, Old Tappan, N. J.
  • Burrows, V. G. (1968), VHF Radio Propagation in the Troposphere, Int. Textbooks, Scranton, Pa.
  • Davies, K. (1990), Ionospheric Radio, Peter Peregrinus, London.
  • Kushida, Y., and R. Kushida (2002), Possibility of earthquake forecast by radio observations in the VHF band, J. Atmos. Electr., 22, 239255.
  • Ichinose, M., and S. Kainuma (1996), Polarization characteristics of VHF radio waves reflected by the Es-Layer, IEEE Trans. Broadcasting, 42, 8287.
  • Molchanov, O. A., and M. Hayakawa (1998), Subionospheric VLF signal perturbations possibly related to earthquakes, J. Geophys. Res., 103, 17,48917,504.
  • Liu, J. Y., Y. I. Chen, S. A. Pulinetset al. (2000), Seismo-ionospheric signatures prior to M ≥ 6.0 Taiwan earthquakes, Geophys. Res. Lett., 27, 31133116.
  • Sakai, K., T. Takano, and S. Shimakura (2001), Observation system for anomalous propagation of FM radio broadcasting wave related to earthquakes and its preliminary result, J. Atmos. Electr., 21, 7178.
  • Smith, E. K.Jr., and S. Matsushita (Eds.) (1962), Ionospheric Sporadic E, Pergamon, New York.