1. Anderson, N.: Proc. Inst. Radio Eng. 19, 1150 (1931)
2. Basak, T., Chakrabarti, S.K.: Astrophys Space Sci. 348(2), 315–326 (2013)
3. Budden, K.G.: Radio Waves in the Ionosphere. Cambridge University Press, Cambridge (1966)
4. Burgess, B., Jones, T.B.: Radio. Sc. 2(6), 619–626 (1967)
5. Chakrabarti, S.K.: AIP Conference Proceedings, vol. 1053 (2010)