%0 Journal Article %A D. Khadzhiev %T Properties of operators of extension and contraction of ideals of algebras of invariants of reductive groups in positive characteristic %J Funkcionalʹnyj analiz i ego priloženiâ %D 1991 %P 53-61 %V 25 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1991_25_4_a4/ %G ru %F FAA_1991_25_4_a4