@article{DAN_1964_154_6_a9,
     author = {L. \'E. Reizi\c{n}\v{s}},
     title = {A homeomorphism of a system of differential equations in neighbourhoods of closed trajectories},
     journal = {Doklady Akademii Nauk},
     pages = {1280--1282},
     publisher = {mathdoc},
     volume = {154},
     number = {6},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_154_6_a9/}
}