@article{DE_1994_30_2_a3,
     author = {O. P. Stepanovich},
     title = {Decreasing perturbations that preserve the characteristic vectors of linear systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {213--220},
     publisher = {mathdoc},
     volume = {30},
     number = {2},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1994_30_2_a3/}
}