@article{ELMA_1966__21_140829,
     author = {Hanfried Lenz},
     title = {Zur {Axiomatik} der ebenen euklidischen {Geometrie.}},
     journal = {Elemente der Mathematik},
     pages = {121--132},
     publisher = {mathdoc},
     volume = {21},
     year = {1966},
     zbl = {0149.17701},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1966__21_140829/}
}