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@article{IVM_1988_10_a7, author = {M. V. Sapir and L. N. Shevrin}, title = {Residually small varieties of semigroups and groups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {41--49}, publisher = {mathdoc}, number = {10}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1988_10_a7/} }
M. V. Sapir; L. N. Shevrin. Residually small varieties of semigroups and groups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 10 (1988), pp. 41-49. http://geodesic.mathdoc.fr/item/IVM_1988_10_a7/