%0 Journal Article %A Mikio Niimura %T On a Theorem of Gross-Iversen Type on Riemann Surfaces. %J Mathematische Zeitschrift %D 1976 %P 13-16 %V 149 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1976__149_172374/ %F MZ_1976__149_172374