@article{ELMA_1976__31_141166,
     author = {D. Ruoff and J. Shilleto},
     title = {Das {Parallelenaxiom} im affinen {Raum.}},
     journal = {Elemente der Mathematik},
     pages = {9--14},
     publisher = {mathdoc},
     volume = {31},
     year = {1976},
     zbl = {0318.50007},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1976__31_141166/}
}