@article{TM_2007_256_a12,
     author = {A. V. Kochergin},
     title = {Nondegenerate {Saddle} {Points} and the {Absence} of {Mixing} in {Flows} on {Surfaces}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {252--266},
     publisher = {mathdoc},
     volume = {256},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2007_256_a12/}
}