%0 Journal Article %A Richard Mandelbaum %T Unstable Bundles and Branched Structures on Riemann Surfaces. %J Mathematische Annalen %D 1975 %P 49-60 %V 214 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1975__214_162680/ %F MAN_1975__214_162680