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@article{IVM_1973_5_a0, author = {I. L. Bondi}, title = {The decision problem for normed linear spaces and for {Hilbert} spaces}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {3--10}, publisher = {mathdoc}, number = {5}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1973_5_a0/} }
I. L. Bondi. The decision problem for normed linear spaces and for Hilbert spaces. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 5 (1973), pp. 3-10. http://geodesic.mathdoc.fr/item/IVM_1973_5_a0/