@article{DE_1997_33_2_a13,
     author = {O. P. Stepanovich},
     title = {The influence of exponentially decreasing perturbations on the {Demidovich} characteristic exponents of diagonal systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {245--248},
     publisher = {mathdoc},
     volume = {33},
     number = {2},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_2_a13/}
}