1. S. C. Jardin, inMultiple Timescales, edit́ed by J. Brackbill and B. Cohen (Academic, New York, in press).
2. J. D. Jackson,Classical Electrodynamics, (Wiley New York, 1965), p. 141.
3. The Princeton spectral equilibrium code: PSEC
4. Use of the virtual-casing principle in calculating the containing magnetic field in toroidal plasma systems
5. V. D. Shafranov, inReviews of Plasma Physics, edited by M. A. Leontovich (Consultants Bureau, New York, 1966), Vol. 2, p. 122.