TY - JOUR AU - A. V. Tishchenko TI - Weakly special and special radicals in semigroups JO - Sbornik. Mathematics PY - 1974 SP - 521 EP - 534 VL - 23 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1974_23_4_a3/ LA - en ID - SM_1974_23_4_a3 ER -