@article{FAA_1967_1_2_a6,
     author = {A. M. Stepin},
     title = {Spectrum and approximation of metric automorphisms by periodic transformations},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {77--80},
     publisher = {mathdoc},
     volume = {1},
     number = {2},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1967_1_2_a6/}
}