@article{MZ_1978__164_172781,
     author = {Armin Herzer},
     title = {B\"uschels\"atze zur {Charakterisierung} projektiv darstellbarer {Zykelebenen.}},
     journal = {Mathematische Zeitschrift},
     pages = {215--238},
     publisher = {mathdoc},
     volume = {164},
     year = {1978},
     zbl = {0377.50011},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__164_172781/}
}