@article{DE_1999_35_7_a17,
     author = {A. R. Gajduk},
     title = {On the determination of the characteristic polynomial associated with a system of ordinary differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {998--999},
     year = {1999},
     volume = {35},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1999_35_7_a17/}
}