TY - JOUR AU - Danchev, P. V. TI - Direct decompositions and basic subgroups in commutative group rings JO - Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica PY - 2006 SP - 53 EP - 56 VL - 45 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AUPO_2006__45_1_a4/ LA - en ID - AUPO_2006__45_1_a4 ER -