1. The straight helical heliotron field
2. K. Uo, A. Iiyoshi, T. Obiki, S. Morimoto, A. Sasaki, K. Kondo, S. Yoshioka, I. Ohtake, S. Konoshima, M. Sato, O. Motojima, M. Koyama, in Proc. 5th Int. Conf. on Plasma Physics and Controlled Nuclear Fusion Research, Tokyo 1974, IAEA-CN-33/B5–3.
3. Effect of a Time-Varying Transverse Magnetic Field on the Equilibrium of a Toroidal Plasma
4. F. Karger, et. al., in Proc. 6th Int. Conf. on Plasma Physics and Controlled Nuclear Fusion Research, Berchtesgaden 1976, IAEA-CN-35/A-7.
5. V. Goeler, et. al., Princeton Plasma Physics Laboratory Report MATT-1060 (1974).