@article{MAN_1987__277_164278,
     author = {M. Pannenberg},
     title = {A {Characterization} of {C(X)} {Among} {Algebras} on {Planar} {Sets} by the {Existence} of a {Finite} {Universal} {Korovkin} {System.}},
     journal = {Mathematische Annalen},
     pages = {785--792},
     publisher = {mathdoc},
     volume = {277},
     year = {1987},
     zbl = {0608.41022},
     url = {http://geodesic.mathdoc.fr/item/MAN_1987__277_164278/}
}