%0 Journal Article
%A Walter Benz
%T An elementary proof of the Theorem of Beckmann and Quarles.
%J Elemente der Mathematik
%D 1987
%P 4-9
%V 42
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ELMA_1987__42_4_141394/
%F ELMA_1987__42_4_141394