1. K. S. Polulyakh, Izmeritel'. Tekh., No. 1 (1970).
2. K. S. Polulyakh and E. N. Goncharov, Priborostroenie, No. 10 (1972).
3. B. Z. Mikhlin, High-Frequency Capacitive and Inductive Transducers [in Russian], GÉI, Moscow-Leningrad (1960).
4. F. Klutke, Archiv für Technisches Messen, No. 300, January (1961).
5. V. K. Zhukov et al., Transactions of the Conference of West Siberian Young Scientists on Radioelectronics and Control, Izd. TGU, Tomsk (1974).