@article{DE_1969_5_7_a3,
     author = {N. A. Izobov},
     title = {The highest exponent of a linear system with exponential perturbations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1186--1192},
     publisher = {mathdoc},
     volume = {5},
     number = {7},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_7_a3/}
}