1. Benito E., Bourdillon A., Bourdillon A., Rannou V. Inversion of HF backscatter ionograms using elevation scans. J. Atm. Solar-Terr. Phys. 2008, vol. 70, no. 15, pp. 1935–1948. DOI: 10.1016/j.jastp.2008.09.031., Benito E., Bourdillon A., Bourdillon A., Rannou V. Inversion of HF backscatter ionograms using elevation scans. J. Atm. Solar-Terr. Phys. 2008, vol. 70, no. 15, pp. 1935–1948. DOI: 10.1016/j.jastp.2008.09.031.
2. Bilitza D., Altadill D., Truhlik V., Shubin V., Galkin I., Reinisch B., Huang X. International Reference Ionosphere 2016: From ionospheric climate to real-time weather predictions. Space Weather. 2017, vol.15, no. 2, pp. 418–429., Bilitza D., Altadill D., Truhlik V., Shubin V., Galkin I., Reinisch B., Huang X. International Reference Ionosphere 2016: From ionospheric climate to real-time weather predictions. Space Weather. 2017, vol.15, no. 2, pp. 418–429.
3. Croft T.A. Hoogansian H. Exact ray calculations in a quasi-parabolic ionosphere with no magnetic field. Radio Sci. 1968, vol. 3, no. 1, pp. 69–74., Croft T.A. Hoogansian H. Exact ray calculations in a quasi-parabolic ionosphere with no magnetic field. Radio Sci. 1968, vol. 3, no. 1, pp. 69–74.
4. Davies K. Ionospheric Radio Waves. Blaisdell, London, 1969. 460 p., Davies K. Ionospheric Radio Waves. Blaisdell, London, 1969. 460 p.
5. Kurkin V.I., Orlov I.I., Popov V.N. Metod normalnykh voln v problem korotkovolnovoi svyazi [Normal Wave Technique in HF Radio Communication Problem]. Moscow, Nauka, 1981. (In Russian)., Kurkin V.I., Orlov I.I., Popov V.N. Metod normalnykh voln v problem korotkovolnovoi svyazi [Normal Wave Technique in HF Radio Communication Problem]. Moscow, Nauka, 1981. (In Russian).