Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1957__12_140667, author = {G. Ringel}, title = {\"Uber {Geraden} in allgemeiner {Lage.}}, journal = {Elemente der Mathematik}, pages = {75--82}, publisher = {mathdoc}, volume = {12}, year = {1957}, zbl = {0078.34501}, url = {http://geodesic.mathdoc.fr/item/ELMA_1957__12_140667/} }
G. Ringel. Über Geraden in allgemeiner Lage.. Elemente der Mathematik, Tome 12 (1957), pp. 75-82. http://geodesic.mathdoc.fr/item/ELMA_1957__12_140667/