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2. Alfvén, H.: 1975, ?Electric Current Structure of the Magnetosphere? in B. Hultqvist and L. Stenflo (eds.),Physics of the Hot Plasma in the Magnetosphere, Plenum Publ. Co., New York.
3. Alfvén, H.: 1976, ?On Frozen-in Field Lines and Field-line Reconnection?,J. Geophys. Res. 81 (22), 4019.
4. Alfvén, H.: 1977, ?Electric Currents in Cosmic Plasma?,Rev. Geophys. and Space Phys. 15, 271.
5. Alfvén, H. and Arrhenius, G.: 1976,Evolution of the Solar System, Chapter 15, NASA SP 345.