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@article{IVM_1989_12_a2, author = {V. G. Ershov}, title = {Extension of a~partial-difference operator with a~nondense domain}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {15--18}, publisher = {mathdoc}, number = {12}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1989_12_a2/} }
V. G. Ershov. Extension of a~partial-difference operator with a~nondense domain. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 12 (1989), pp. 15-18. http://geodesic.mathdoc.fr/item/IVM_1989_12_a2/