%0 Journal Article %A M. Pannenberg %T A Characterization of C(X) Among Algebras on Planar Sets by the Existence of a Finite Universal Korovkin System. %J Mathematische Annalen %D 1987 %P 785-792 %V 277 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1987__277_164278/ %F MAN_1987__277_164278