@article{MZM_1973_13_3_a8,
     author = {A. M. Stepin},
     title = {Connections between the approximative and spectral properties of metric automorphisms},
     journal = {Matemati\v{c}eskie zametki},
     pages = {403--409},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1973_13_3_a8/}
}