1. ‘Über das Mikrowellenverhalten der Nichtlineare Dielektrika’, Philips Res. Rep., Suppl. 2, 1970 p. 1–145 (in German)
2. Vendik, O.G., ‘Segnetoelektriki v Tekhnike SVCH’, (Sovetskoe Radio 1979),in Russian
3. Shen, Z.-Y.: ‘High-temperature superconducting microwave circuits’, (Artech House 1994)