@article{DE_1995_31_8_a3,
     author = {N. A. Izobov and A. V. Filiptsov},
     title = {On the sharpness of conditions for the coincidence of lower {Perron} exponents of linear differential systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1300--1309},
     publisher = {mathdoc},
     volume = {31},
     number = {8},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1995_31_8_a3/}
}