1. SCHÜLLER, F. C. et al., Gas-blanket Studies in Toroidal Arcs, Proc. 5th Int. Conf. on Plasma Phys. and Contr. Nucl. Fusion Res., Tokyo II, 725 (1974).
2. SCHÜLLER, F. C. et al., Ringboog: A Toroidal Discharge in a Gas Blanket, Proc. 7th Eur. Conf. on Contr. Fusion and Plasma Phys., Lausanne I, 128 (1975).
3. Stability of Plasmas Penetrated by Neutral Gas;LEHNERT;Nucl. Fusion,1973
4. DE HAAS, R. S., Technical Aspects of Ringboog, Proc. 8th Symp. on Fusion Technology, Noordwijkerhout 39 (1974).
5. HUGENHOLTZ, C. A. J., MEDDENS, B. J. H., A CO2-laser Interferometer with Direct Read-out of Phase Shift, Rijnhuizen Report, to be published.