1. The preliminary results of magnetic fields measurements by “Intercosmos-Bulgaria-1300” satellite;Arshinkov;Kosmicheskie Issledovania,1983
2. Intense localized perturbations of auroral ionosphere;Balebanov,1983
3. Electric double structures in the auroral ionosphere;Bilichenko,1982
4. Spectral Analysis and its Applications;Jenkins,1968
5. Intense, variable electric fields at ionospheric altitudes in the high latitude regions as observed by DE-2;Maynard;Geophys. Res. Lett.,1982