@article{DE_1981_17_2_a4,
     author = {I. G. Petrovskaya},
     title = {TM-equivalence and classification of noncompact invariant sets of dynamical systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {233--240},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_2_a4/}
}