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@article{IVM_1985_2_a3, author = {L. B. Zelenko}, title = {Extensions of a~class of nonlinear operators in {Hilbert} {space.~I}}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {28--37}, publisher = {mathdoc}, number = {2}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1985_2_a3/} }
L. B. Zelenko. Extensions of a~class of nonlinear operators in Hilbert space.~I. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 2 (1985), pp. 28-37. http://geodesic.mathdoc.fr/item/IVM_1985_2_a3/