%0 Journal Article %A Nontas E. Kechagias %T Modular invariant theory, homology operations, and the transfer between rings of invariants of parabolic subgroups %J Μαθηματική Επιθεώρηση %D 1992 %P 79-88 %V 38 %I mathdoc %U http://geodesic.mathdoc.fr/item/MR_1992__38_a16/ %G gr %F MR_1992__38_a16