%0 Journal Article %A M. V. Volkov %T Semigroup varieties with a modular subvariety lattice %J Doklady Akademii Nauk %D 1992 %P 409-413 %V 326 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1992_326_3_a3/ %G ru %F DAN_1992_326_3_a3