@article{DE_1988_24_5_a5,
     author = {N. A. Izobov},
     title = {The number of characteristic and lower exponents of an exponentially stable system with higher-order perturbations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {784--795},
     publisher = {mathdoc},
     volume = {24},
     number = {5},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_5_a5/}
}