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:https://doi.org/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.
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.
4. 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).
6. Li N., Zhao Z., Zhou C., Chen G., Yang G., Huang S., Li T. Inversion of sweep frequency backscatter ionogram from Monostatic HF Sky-Wave Radar. IEEE Geoscience and Remote Sensing Lett. 2013, vol. 10, no. 6, pp. 1360-1364.
7. Norman R.J., Dyson P.L. HF radar backscatter inversion technique. Radio Sci. 2006, vol. 41, RS4010. DOI:https://doi.org/10.1029/2005RS003355.
8. Penzin M.S., Ponomarchuk S.N., Grozov V.P., Kurkin V.I. Real-time techniques for interpretation of ionospheric backscatter sounding data. Radio Sci. 2019, vol. 54, iss. 5, pp. 480-491. DOI:https://doi.org/10.1029/2018RS006656.
9. Podlesnyi A.V., Brynko I.G., Kurkin V.I., et al. Multifunctional chirp ionosonde for monitoring the ionosphere. Geliogeofizicheskie issledovaniya [Heliogeophys. Res.]. 2013, no. 4, pp. 24-31. (In Russian).
10. Ponomarchuk S.N, Kurkin V.I., Oinats A.V. The diagnostics of ionosphere and earth ground surface by backscatter sounding data. Proc. PIERS-2009. Moscow, 2009. vol. I-II, pp. 1307-1310.
11. Ponomarchuk S.N., Grozov V.P., Kotovich G.V., Kurkin V.I., Penzin M.S. Diagnostics of HF radio channel: based on data from backscatter ionospheric sounding by continuous chirp signal. Solar-Terrestrial Physics. 2018, vol. 4, iss. 2. pp. 17-23. DOI:https://doi.org/10.12737/stp-42201804.
12. Ponomarchuk S.N., Kurkin V.I., Penzin M.S. Features of backscatter ionospheric sounding as studied with a chirp ionosonde. Solar-Terr. Phys. 2017, vol. 3, iss. 3, pp. 54-60. DOI:https://doi.org/10.12737/stp-332017062017.
13. Rao N.N. Inversion of sweep-frequency sky-wave backscatter leading edge for quasiparabolic ionospheric layer parameters. Radio Sci. 1974, vol. 9, no. 10. pp. 845-847.