@article{DE_1983_19_3_a25,
     author = {S. P. Tokarev},
     title = {Analytic equivalence of systems of differential equations in the neighborhood of an exponentially stable invariant torus},
     journal = {Differencialʹnye uravneni\^a},
     pages = {540--543},
     publisher = {mathdoc},
     volume = {19},
     number = {3},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_3_a25/}
}