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@article{IVM_1984_11_a14, author = {V. V. Shurygin}, title = {On the theory of higher-order differential groups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {77--81}, publisher = {mathdoc}, number = {11}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1984_11_a14/} }
V. V. Shurygin. On the theory of higher-order differential groups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1984), pp. 77-81. http://geodesic.mathdoc.fr/item/IVM_1984_11_a14/