1. Alpert Ya L (1990) Space plasma, vols 1 and 2, Cambridge University Press, Cambridge-New York-Melbourne-Sydney
2. Balser M, Wagner CA (1960) Observation of Earth-ionosphere cavity resonances. Nature 188:638–641
3. Balser M, Wagner CA (1962a) Diurnal power variations of the Earth-ionosphere cavity modes and their relationship to worldwide thunderstorm activity. J Geophys Res 67:619–625
4. Balser M, Wagner CA (1962b) On frequency variations of the Earth-ionosphere cavity modes, J Geophys Res, 67(4):081–4083
5. Belyaev PP, Polyakov SV, Rapoport VO, Trakhtengertz VY (1987) Discovery of the resonance spectrum structure of atmospheric electromagnetic noise background in the range of short-period geomagnetic pulsations. Dokl Akad Nauk SSSR 297:840–846