@article{ISU_2021_21_2_a3,
     author = {V. B. Tlyachev and A. D. Ushkho and D. S. Ushkho},
     title = {On periodic solutions of {Rayleigh} equation},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {173--181},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2021_21_2_a3/}
}