@article{MAN_1955__130_160465,
     author = {G. Ringel},
     title = {Wie man die geschlossenen nichtorientierbaren {Fl\"achen} in m\"oglichst wenig {Dreiecke} zerlegen kann.},
     journal = {Mathematische Annalen},
     pages = {317--326},
     publisher = {mathdoc},
     volume = {130},
     year = {1955},
     zbl = {0066.41702},
     url = {http://geodesic.mathdoc.fr/item/MAN_1955__130_160465/}
}