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@article{DE_1976_12_2_a10, author = {K. S. Sibirskii and V. D. Taku}, title = {Algebraic invariants of multidimensional differential systems}, journal = {Differencialʹnye uravneni\^a}, pages = {281--291}, publisher = {mathdoc}, volume = {12}, number = {2}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1976_12_2_a10/} }
K. S. Sibirskii; V. D. Taku. Algebraic invariants of multidimensional differential systems. Differencialʹnye uravneniâ, Tome 12 (1976) no. 2, pp. 281-291. http://geodesic.mathdoc.fr/item/DE_1976_12_2_a10/