1. Method of dynamical spectral analysis in the study of the inhomogeneous structure of the ionosphere;E.L. Afraimovich,1972
2. Automated system for measuring Doppler frequencies and angles of arrival of radio signals reflected from the ionosphere;E.L. Afraimovich,1977
3. Agy, Y., Baker, D.M., and Jones, R.M., Studies of solar flare effects and other ionospheric disturbances by a high frequency Doppler technique, US Department of Commerce, National Bureau of Standards, Tech. Note no. 306, 1965.
4. Akasofu, S.I. and Chapman, S., Solar–Terrestrial Physics, London: Oxford University Press, 1972; Moscow: Mir, 1975.
5. Azeem, I., Spectral asymmetry of near-concentric traveling ionospheric disturbances due to Doppler-shifted atmospheric gravity waves, Front. Astron. Space Sci., 2021, vol. 8. https://doi.org/10.3389/fspas.2021.690480