%0 Journal Article %A B. Kh. Kirshtein %T Invariant subrings of the induced ring on the $4\times4$ symplectic group %J Sbornik. Mathematics %D 1972 %P 228-234 %V 18 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1972_18_2_a4/ %G en %F SM_1972_18_2_a4