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@article{DE_1974_10_9_a10, author = {G. N. Petrovskiǐ}, title = {Certain properties of systems of linear differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {1652--1661}, publisher = {mathdoc}, volume = {10}, number = {9}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1974_10_9_a10/} }
G. N. Petrovskiǐ. Certain properties of systems of linear differential equations. Differencialʹnye uravneniâ, Tome 10 (1974) no. 9, pp. 1652-1661. http://geodesic.mathdoc.fr/item/DE_1974_10_9_a10/