@article{DE_1986_22_3_a10,
     author = {V. E. Chernyshev},
     title = {Bifurcations of invariant sets in a neighborhood of a contour of trajectories with a rest point which is a saddle},
     journal = {Differencialʹnye uravneni\^a},
     pages = {439--445},
     publisher = {mathdoc},
     volume = {22},
     number = {3},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_3_a10/}
}