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2. A model of the geomagnetic field at epoch 1975;Barraclough;Geophys. J. R. Astron. Soc.,1975
3. Explorer 18 study of the stability of the magnetopause using a Kelvin-Helmholtz stability criterion;Boller;J. Geophys. Res.,1973
4. Relation of the interplanetary magnetic field direction to the system of stable oscillations (in Russian;Bol'shakova;Dokl. Akad. Nauk SSSR,1968
5. Chandrasekhar, S., , Hydrodynamic and Hydromagnetic Stability, Oxford University Press, New York, 1961,