1. CIRA 1972 = COSPAR International Reference Atmosphere,1972
2. Fitting of multiregion ionospheric profiles of electron density by a single analytical function of height;Booker;J. Atmosph. Terr. Phys.,1977
3. Fitting of multiregion ionospheric profiles of electron density by a single analytical function of height;Booker;J. Atmosph. Terr. Phys.,1977
4. Reflection of waves in an inhomogeneous absorbing medium;Epstein,1930