@article{DE_1997_33_2_a5,
     author = {N. A. Izobov and A. V. Filiptsov},
     title = {On the invariance of lower {Perron} exponents of linear systems with respect to exponentially decreasing perturbations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {177--184},
     publisher = {mathdoc},
     volume = {33},
     number = {2},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_2_a5/}
}