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@article{DE_1967_3_5_a8, author = {N. A. Izobov}, title = {Weakly irregular system}, journal = {Differencialʹnye uravneni\^a}, pages = {787--795}, publisher = {mathdoc}, volume = {3}, number = {5}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1967_3_5_a8/} }
N. A. Izobov. Weakly irregular system. Differencialʹnye uravneniâ, Tome 3 (1967) no. 5, pp. 787-795. http://geodesic.mathdoc.fr/item/DE_1967_3_5_a8/