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@article{DE_1977_13_5_a5, author = {N. A. Izobov}, title = {The minimal exponent of a two-dimensional linear differential system}, journal = {Differencialʹnye uravneni\^a}, pages = {848--858}, publisher = {mathdoc}, volume = {13}, number = {5}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1977_13_5_a5/} }
N. A. Izobov. The minimal exponent of a two-dimensional linear differential system. Differencialʹnye uravneniâ, Tome 13 (1977) no. 5, pp. 848-858. http://geodesic.mathdoc.fr/item/DE_1977_13_5_a5/