1. Alfven, H., 1954, “On the Origin of the Solar System”, Oxford University Press, Oxford, pp. 26–47.
2. Alfven, H. and Arrhenius, G., 1976, “Evolution of the Solar System”, NASA SP-345, NASA, Washington, D. C., pp. 369–406.
3. Dijkhuis, G. C., 1991, Boundary Layer Model and Calculation for Horizontal Thundercloud Electrification Preceding Natural and Rocket-Triggered Lightning, in.: “Environmental and Space Electromagnetics”, H. Kikuchi, ed., Springer-Verlag, Tokyo, pp. 113–124.
4. Gurnett, D. A., 1989, Merging of Aircraft Vortex Trails: Similarities to Magnetic Field Merging, Geophys, Res. Lett, 16: 17–20.
5. Hones, E. W., ed., 1984. “Magnetic Reconnection in Space and Laboratory Plasmas”, American Geophysical Union, Washington, D. C.