@article{DANMA_2021_499_a4,
     author = {V. V. Kozlov},
     title = {Symplectic geometry of the {Koopman} operator},
     journal = {Doklady Rossijskoj akademii nauk. Matematika, informatika, processy upravleni\^a},
     pages = {20--25},
     publisher = {mathdoc},
     volume = {499},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DANMA_2021_499_a4/}
}