%0 Journal Article %A R. Gilmer %A W. Heinzer %T An Application of Jonsson Modules to Some Questions Concerning Proper Subrings. %J Mathematica Scandinavica %D 1992 %P 34-42 %V 70 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1992__70_1_167186/ %F MS2_1992__70_1_167186