@article{DAN_1977_235_4_a2,
     author = {M. I. Brin},
     title = {Nonwandering points of {U-diffeomorphisms}},
     journal = {Doklady Akademii Nauk},
     pages = {737--740},
     publisher = {mathdoc},
     volume = {235},
     number = {4},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_235_4_a2/}
}