1. W. Meyer, IEEE Trans. Commun. COM-26, 449 (1978).
2. W. Meyer, paper presented at the 7th European Microwave Conference, Copenhagen, Denmark, September 5–8, 1977.
3. W. Meyer, in: Proceedings 6th International Cryogenic Engineering Conference, IPC Science and Technology Press, Guildford Surrey, England (1976), p. 367.
4. Lupolen 4261A, BASF, Ludwigshafen, West Germany.
5. W. Meyer, paper presented at the International Cryogenic Materials Conference, Boulder, Colorado, U.S.A., August 2–5, 1977.