1. G. M. Batanov, E. N. Bondarchuk, S. A. Bulgakov, et al., in Proceedings of the 7th International Conference on Engineering Problems of Fusion Reactors, St. Petersburg, 2002.
2. A. N. Boozer, Phys. Fluids 26, 496 (1983).
3. J. Nührenberg and R. Zille, Phys. Lett. A 129, 113 (1988).
4. F. Anderson, A. Almagri, D. Anderson, et al., Fusion Technol. 27, 273 (1995).
5. J. Nührenberg, W. Lotz, and S. Gori, in Proceedings of International School of Plasma Physics on Theory of Fusion Plasmas (SIF, Bologna, 1994), p. 3.