@article{DE_1972_8_5_a8,
     author = {A. I. Perov and I. Yu. \`Egle},
     title = {On the {Poincar\'e--Denjoy} theory of multidimensional differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {801--810},
     publisher = {mathdoc},
     volume = {8},
     number = {5},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_5_a8/}
}