@article{MAN_1957__133_160554,
     author = {Unkelbach. H.},
     title = {Die funktionentheoretischen {Invarianten} f\"ur {Ecken} gerader {Ordnung.}},
     journal = {Mathematische Annalen},
     pages = {320--327},
     publisher = {mathdoc},
     volume = {133},
     year = {1957},
     zbl = {0080.28802},
     url = {http://geodesic.mathdoc.fr/item/MAN_1957__133_160554/}
}