@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/}
}