@article{IVM_1987_8_a1,
     author = {I. B. Gontareva},
     title = {On the existence of closed trajectories of structurally stable autonomous systems},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {11--13},
     publisher = {mathdoc},
     number = {8},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1987_8_a1/}
}