1. Feedback and Control Systems;Distefano,1967
2. Equilibrium and stability of MHD-fluids by dynamic techniques
3. F. Hoffmann, Garching Report 2/205, September 1972; D. Zrnic, et al, Phys.Fl. 13, 1987(1970)
4. T. Chu, p Cu 1 in /17.5/ (Innsbruck Congress 1973); see also /17.210/
5. A Course of Modern Analysis;Whittaker,1927