@article{MZM_1976_19_3_a14,
     author = {A. V. Kochergin},
     title = {Nonsingular saddle points and the absence of mixing},
     journal = {Matemati\v{c}eskie zametki},
     pages = {453--468},
     publisher = {mathdoc},
     volume = {19},
     number = {3},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1976_19_3_a14/}
}