Altadill, D., Apostolov, E. M., Boska, J., Lastovicka, J., & Sauli, P. (2004). Planetary and gravity wave signatures in the F-region ionosphere with impacton radio propagation predictionsand variability. Annals of Geophysics, 47(2-3 Sup.). https://doi.org/10.4401/ag-3288