@article{DE_1991_27_11_a19,
     author = {O. P. Stepanovich},
     title = {Preservation of the characteristic vectors of a linear system under perturbation of its coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1990--1994},
     publisher = {mathdoc},
     volume = {27},
     number = {11},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_11_a19/}
}