PACS:01.10.Fv DOI:10.1070/PU1980v023n12ABEH005083 URL: https://ufn.ru/en/articles/1980/12/h/ Citation: Ivanov I V "Low-temperature ferroelectrics: dielectric nonlinearity and parametric interactions in the microwave band" Sov. Phys. Usp.23 869–871 (1980)