@article{MZ_1954__61_169444,
     author = {Wilhelm Klingenberg},
     title = {Euklidische {Ebenen} mit {Nachbarelementen.}},
     journal = {Mathematische Zeitschrift},
     pages = {1--25},
     publisher = {mathdoc},
     volume = {61},
     year = {1954},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1954__61_169444/}
}