%0 Journal Article %A Tzouvaras, Athanossios %T A notion of measure for classes in AST %J Commentationes Mathematicae Universitatis Carolinae %D 1987 %P 449-455 %V 28 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1987__28_3_a7/ %G en %F CMUC_1987__28_3_a7