%0 Journal Article %A M. V. Sapir %T Problems of Burnside type and the finite basis property in varieties of semigroups %J Izvestiya. Mathematics %D 1988 %P 295-314 %V 30 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1988_30_2_a5/ %G en %F IM2_1988_30_2_a5