1. Bezrodny VG, Nickolaenko AP, Sinitsin VG (1977) Waves in natural waveguides. J Atmos Terr Phys 39:661–688
2. Bezrodny VG (2005) Asymptotic theory of Schumann resonance fields in gyrotropic Earth—ionosphere cavity. In: Litvinenko LN, Yamplosky YM (eds) Electromagnetic manifestations of geophysical effects at Antarctica. Kharkov, Radioastronomical Institute of NASU, pp 105–121 (in Russian)
3. Bliokh PV, Nickolaenko AP, Filippov YF (1968) Diurnal variations of eigen frequencies of the Earth-ionosphere resonator due to eccentricity of the geomagnetic field. Geomagn Aeron 8:250–260 (Geomagn Aeron Engl Transl 8:198–206)
4. Bliokh PV, Nickolaenko AP, Filippov YF (1969) Excitation of the Earth-ionosphere wavegiude by the lightning discharges and the influence of geomagnetic field on noise spectrum. Alta Freq 38(3–4):189–192
5. Bliokh PV, Bormotov VN, Kontorovich VM, Nickolaenko AP, Sapogova NA, Shulga VF, Filippov YF (1971) On the degeneracy lift in the spherical earth-ionosphere cavity. Preprint 10:58 (Institute of Radiophysics and Electronics of the Ukrainian Academy of Sciences, Kharkov, Ukraine, in Russian)