1. The RINGBOOG team, “Gas-blanket studies in a toroidal discharge,” Proc. International Symposium on Plasma Wall Interaction, Jülich, 18–22 October 1976, p. 647.
2. B. J. H. Meddens and R. J. Taylor, “A multiradian MM-interferometer using a digital phase comparator,” Rijnhuizen Report 74–85 (1974);
3. also MIT RLE Report PRR 7411, August 1974.
4. C. A. J. Hugenholtz and B. J. H. Meddens, “A CO2-laser interferometer with direct read-out of phase-shift,” Rijnhuizen Report 76–100 (1976).