1. S. von Goeleret al., Diagnostics for Fusion Reactor Conditions,Proceedings of the International School of Plasma Physics, Varenna (Pergamon, London, 1982), Vol. I, p. 87.
2. Free-Free Bremsstrahlung from a Plasma with an Anisotropic Electron Velocity Distribution
3. Proceedings of the 5th EPS Conference on Plasma Physics and Controlled Fusion;von Goeler S.,1972