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@article{IVM_1978_9_a11, author = {R. Sh. Omanadze}, title = {Some generalizations of the concept of productivity of a~set}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {84--88}, publisher = {mathdoc}, number = {9}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1978_9_a11/} }
R. Sh. Omanadze. Some generalizations of the concept of productivity of a~set. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 9 (1978), pp. 84-88. http://geodesic.mathdoc.fr/item/IVM_1978_9_a11/