@article{MZ_1976__149_172374,
     author = {Mikio Niimura},
     title = {On a {Theorem} of {Gross-Iversen} {Type} on {Riemann} {Surfaces.}},
     journal = {Mathematische Zeitschrift},
     pages = {13--16},
     publisher = {mathdoc},
     volume = {149},
     year = {1976},
     zbl = {0343.30020},
     url = {http://geodesic.mathdoc.fr/item/MZ_1976__149_172374/}
}