@article{DE_1996_32_10_a6,
     author = {N. A. Izobov and S. N. Batan},
     title = {On the instability of characteristic exponents of linear differential systems under {Perron} perturbations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1341--1347},
     publisher = {mathdoc},
     volume = {32},
     number = {10},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1996_32_10_a6/}
}