1. Full non-linear treatment of the global thermospheric wind system;Blum,1973
2. Some new aspects on the superrotation of the thermosphere;Blum;J. atmos. terr. Phys.,1974
3. Classification of meteor orbits;Ceplecha;Smithson. Contr. Astrophys.,1965
4. The electrical conductivity of the ionosphere;Chapman;Nuovo Cim.,1965
5. COSPAR International Reference Atmosphere 1972;CIRA 1972,1972