@article{MAN_1937__113_159858,
     author = {\'O. Danielsson},
     title = {\"Uber orientierbare und nicht orientierbare algebraische {Fl\"achen}},
     journal = {Mathematische Annalen},
     pages = {LXXXIII--XCIV},
     year = {1937},
     volume = {113},
     zbl = {62.0772.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1937__113_159858/}
}