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@article{IVM_1961_2_a3, author = {I. A. Kipriyanov}, title = {Certain properties of fractional directional derivatives}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {32--40}, publisher = {mathdoc}, number = {2}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1961_2_a3/} }
I. A. Kipriyanov. Certain properties of fractional directional derivatives. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 2 (1961), pp. 32-40. http://geodesic.mathdoc.fr/item/IVM_1961_2_a3/