%0 Journal Article %A P. V. Danchev %T Invariants for Commutative Group Algebras of Mixed and Torsion Groups %J Mathematica balkanica %D 1999 %P 1 %V 13 %N 1-2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MABA_1999_13_1-2_a0/ %F MABA_1999_13_1-2_a0