1. M. Aschwanden, Physics of the Solar Corona: An Introduction with Problems and Solutions (Springer Science, New York, 2006).
2. L. Biermann, Naturwissenschaften 33, 118 (1946).
3. L. Biermann, Z. Astrophys. 25, 161 (1948).
4. S. I. Braginskii, in Problems of Plasma Theory, Ed. by M. A. Leontovich (Atomizdat, Moscow, 1963), Vol. 1 [in Russian].
5. M. Carlsson, P. Judge, and K. Wilhelm, Astrophys. J. 486, L63 (1997).