%0 Journal Article %A Zbigniew Gajda %T On separation theorems for subadditive and superadditive functionals %J Studia Mathematica %D 1991 %P 25-38 %V 100 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-100-1-25-38/ %R 10.4064/sm-100-1-25-38 %G en %F 10_4064_sm_100_1_25_38