@article{DE_1986_22_5_a3,
     author = {I. U. Bronshtein and A. Ya. Kopanskii},
     title = {Structurally stable obstructions to smooth linearization in a neighborhood of an invariant manifold},
     journal = {Differencialʹnye uravneni\^a},
     pages = {762--768},
     publisher = {mathdoc},
     volume = {22},
     number = {5},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_5_a3/}
}