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@article{DE_1968_4_5_a21, author = {I. N. Blinov}, title = {A certain class of improper systems}, journal = {Differencialʹnye uravneni\^a}, pages = {949--951}, publisher = {mathdoc}, volume = {4}, number = {5}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1968_4_5_a21/} }
I. N. Blinov. A certain class of improper systems. Differencialʹnye uravneniâ, Tome 4 (1968) no. 5, pp. 949-951. http://geodesic.mathdoc.fr/item/DE_1968_4_5_a21/