%0 Journal Article %A Isidore Fleischer %T Symmetry classes of tensors via semigroup operands. %J Aequationes mathematicae %D 1986 %P 76-80 %V 31 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1986__31_137144/ %F AM2_1986__31_137144