1. V. S. Beskin, Axisymmetric Stationary Flows in Astrophysics (Fizmatlit, Moscow, 2006) [in Russian].
2. A. N. Timokhin, Mon. Not. R. Astron. Soc. 368, 1055 (2006).
3. A. N. Timokhin, arXiv: astro-ph/0607165v2 (2006).
4. I. Contopoulos and A. Spitkovsky, Astrophys. J. 643, 1139 (2006).
5. S. A. Eliseeva, S. B. Popov and V. S. Beskin, arXiv: astro-ph/0611320 (2006).