1. K. Appert, D. Berger, R. Gruber and J. Rappaz, A new finite element approach to the normal mode analysis in magnetohydrodynamics. J. Comput. Phys.,18 (1975), 284–299.
2. K. Appert, D. Berger, R. Gruber, F. Troyon and K. V. Robert, THALIA-A one-dimensional MHD stability program using the method of finite elements, Comput. Phys. Comm.,10 (1975), 11–29.
3. J. Descloux, Two basic properties of finite elements. Report Dept. Math., EPF-Lausanne, 1973.
4. J. Descloux and G. Geymonat, Sur le spectre essentiel d’un opérateur relatif à la stabilité d’un plasma en géométrie toroîdal. C. R. Acad. Sci. Paris,290 (1980), 795–797.
5. J. Descloux, N. Nassif and J. Rappaz, Spectral approximation with error bounds for non-compact operators. Report Dept. Math., EPF-Lausanne, 1977.