@article{MZ_1966__92_170533,
     author = {Andreas Dress},
     title = {Metrische {Ebenen} \"uber quadratisch perfekten {K\"orpern.}},
     journal = {Mathematische Zeitschrift},
     pages = {19--29},
     year = {1966},
     volume = {92},
     zbl = {0136.15002},
     url = {http://geodesic.mathdoc.fr/item/MZ_1966__92_170533/}
}