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@article{DAN_1971_201_2_a6, author = {V. V. Velichenko}, title = {Problems of the invariance of discrete systems}, journal = {Doklady Akademii Nauk}, pages = {284--287}, publisher = {mathdoc}, volume = {201}, number = {2}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_201_2_a6/} }
V. V. Velichenko. Problems of the invariance of discrete systems. Doklady Akademii Nauk, Tome 201 (1971) no. 2, pp. 284-287. http://geodesic.mathdoc.fr/item/DAN_1971_201_2_a6/