%0 Journal Article %A A. V. Tishchenko %T Weakly special and special radicals in semigroups %J Sbornik. Mathematics %D 1974 %P 521-534 %V 23 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1974_23_4_a3/ %G en %F SM_1974_23_4_a3