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@article{IVM_1986_8_a1, author = {V. M. Bruk}, title = {The characteristic function of a~linear relation}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {9--13}, publisher = {mathdoc}, number = {8}, year = {1986}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1986_8_a1/} }
V. M. Bruk. The characteristic function of a~linear relation. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 8 (1986), pp. 9-13. http://geodesic.mathdoc.fr/item/IVM_1986_8_a1/