@article{DE_2002_38_5_a2,
     author = {N. A. Izobov},
     title = {Lower {Bounds} for the {Characteristic} {Exponents} of a {Linear} {Differential} {System} with {Perron} {Perturbations}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {596--602},
     publisher = {mathdoc},
     volume = {38},
     number = {5},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2002_38_5_a2/}
}