%0 Journal Article %A J.M.S. Simoes Pereira %T On Subgraphs as Matroid Cells. %J Mathematische Zeitschrift %D 1972 %P 315-322 %V 127 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1972__127_171778/ %F MZ_1972__127_171778