@article{DAN_1976_230_6_a6,
     author = {Ya. L. Umanskii},
     title = {The scheme of a three-dimensional {Morse{\textendash}Smale} dynamical system without closed trajectories},
     journal = {Doklady Akademii Nauk},
     pages = {1286--1289},
     year = {1976},
     volume = {230},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_230_6_a6/}
}