@article{DE_1970_6_6_a2,
     author = {\`E. A. Tikhonova},
     title = {Similarity of the solutions of a perturbed and an unperturbed system with a divided-diagonal matrix},
     journal = {Differencialʹnye uravneni\^a},
     pages = {962--974},
     publisher = {mathdoc},
     volume = {6},
     number = {6},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1970_6_6_a2/}
}