%0 Journal Article
%A P. Haukkanen
%A J. K. Merikoski
%A T. Tossavainen 
%T Axiomatizing Perpendicularity and Parallelism
%J Journal for geometry and graphics
%D 2011
%P 129-139
%V 15
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JGG_2011_15_2_JGG_2011_15_2_a1/
%F JGG_2011_15_2_JGG_2011_15_2_a1