@article{DE_2003_39_4_a15,
     author = {S. L. Sobolevskii},
     title = {Fixed {Singular} {Points} of {Differential} {Systems}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {563--564},
     publisher = {mathdoc},
     volume = {39},
     number = {4},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2003_39_4_a15/}
}