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@article{DE_1971_7_12_a1, author = {N. A. Izobov}, title = {The canonical form of a linear two-dimensional system with variable coefficients}, journal = {Differencialʹnye uravneni\^a}, pages = {2136--2142}, publisher = {mathdoc}, volume = {7}, number = {12}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1971_7_12_a1/} }
N. A. Izobov. The canonical form of a linear two-dimensional system with variable coefficients. Differencialʹnye uravneniâ, Tome 7 (1971) no. 12, pp. 2136-2142. http://geodesic.mathdoc.fr/item/DE_1971_7_12_a1/