1. Alfv�n, H.: 1940, ?On the Motion of a Charged Particle in a Magnetic Field?,Ark. Mat. Astron: Fys., Swedish Academy of Science,27A, Stockholm.
2. Alfv�n, H.: 1968,Ann. G�ophys. 24, 1.
3. Alfv�n, H.: 1971,Science 172, 991.
4. Alfv�n, H.: 1977,Rev. Geophys. Space Phys. 15, 271.
5. Alfv�n, H. and F�lthammar, C.-G.: 1963,Cosmical Electrodynamics, Clarendon Press, Oxford.