PACS: 78.20.Dj, 78.30.Cp, 42.65.−k, 42.60.He (all) DOI:10.1070/PU1980v023n05ABEH004919 URL: https://ufn.ru/en/articles/1980/5/a/ Citation: Arakelyan S M, Lyakhov G A, Chilingaryan Yu S "Nonlinear optics of liquid crystals" Sov. Phys. Usp.23 245–268 (1980)