PACS:05.45.Df, 05.45.Mt, 43.20.Dk (all) DOI:10.1070/PU1991v034n08ABEH002461 URL: https://ufn.ru/en/articles/1991/8/a/ Citation: Abdullaev S S, Zaslavskii G M "Classical nonlinear dynamics and chaos of rays in problems of wave propagation in inhomogeneous media" Sov. Phys. Usp.34 (8) 645–664 (1991)