Pancheva, D. V., Geophysical Institute, Bulgarian Academy of Sciences, Sofia, Bulgaria

• Annals of Geophysics Vol. 39 No. 4 (1996) - OLD
  A single-station spectral model of the monthly median F-region critical frequency
  Abstract  PDF
• Annals of Geophysics Vol. 39 No. 4 (1996) - OLD
  Modelling of the electron density height profiles in the mid-latitude ionospheric D-region
  Abstract  PDF