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@article{DE_1971_7_5_a12, author = {S. N. Shimanov and N. I. Kazeeva}, title = {A fundamental theorem on critical cases of difference systems}, journal = {Differencialʹnye uravneni\^a}, pages = {910--918}, publisher = {mathdoc}, volume = {7}, number = {5}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1971_7_5_a12/} }
S. N. Shimanov; N. I. Kazeeva. A fundamental theorem on critical cases of difference systems. Differencialʹnye uravneniâ, Tome 7 (1971) no. 5, pp. 910-918. http://geodesic.mathdoc.fr/item/DE_1971_7_5_a12/