@article{DAN_1972_205_3_a2,
     author = {A. V. Kochergin},
     title = {On the absence of mixing in special flows over the rotation of a circle and in flows on a two-dimensional torus},
     journal = {Doklady Akademii Nauk},
     pages = {515--518},
     publisher = {mathdoc},
     volume = {205},
     number = {3},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_205_3_a2/}
}