1. F. J. Tischer: Mikrowellen-Meßtechnik, Springer, Berlin (1958) S.44.
2. G. Megla: Dezimeterwellentechnik, 5. Aufl. Berliner Union, Stuttgart (1962).
3. Operating and Service Manual — Model 431 B — Hewlett-Packard-Comp. Palo Alto, Cal. U.S.A. (1962).
4. R. F. Pramann: A Mircowave Power Meter with a Hundred-fold Reduction of Thermal Drift. Hewlett-Packard Journ. Bd. 12 (1961) Nr. 10.
5. M. Sucher u. H.J. Carlin: Broad-Band Calorimeters for the Measurement of Low and Medium Level Microwave Power. L Analysis and Design. Transact. Inst. Radio Engrs. MTT-6 (1958) S.188.