@article{FAA_1972_6_2_a1,
     author = {V. I. Arnol'd},
     title = {Modes and quasimodes},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {12--20},
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1972_6_2_a1/}
}