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@article{IVM_1982_11_a3, author = {\`E. A. Golubov and M. V. Sapir}, title = {Varieties of finitely approximable semigroups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {21--29}, publisher = {mathdoc}, number = {11}, year = {1982}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1982_11_a3/} }
È. A. Golubov; M. V. Sapir. Varieties of finitely approximable semigroups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1982), pp. 21-29. http://geodesic.mathdoc.fr/item/IVM_1982_11_a3/