W. D. D'haeseleer, W. N. G. Hitchon, J. D. Callen, J. L. Shohet: Flux Coordinates and Magnetic Field Structure — A Guide to a Fundamental Tool of the Plasma Theory. Edited by R. Glowinski, M. Holt, P. Hut, H. B. Keller, J. Killeen, S. A. Orszag and V. V. Rusanov. Springer Series in Computational Physics, Springer Verlag Berlin 1991