@article{DE_1975_11_8_a3,
     author = {S. Yu. Pilyugin},
     title = {The topological equivalence of structurally stable three-dimensional systems without periodic trajectories},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1375--1387},
     year = {1975},
     volume = {11},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_8_a3/}
}