%0 Journal Article %A Demirel, Oğuzhan %T The theorems of Stewart and Steiner in the Poincaré disc model of hyperbolic geometry %J Commentationes Mathematicae Universitatis Carolinae %D 2009 %P 359-371 %V 50 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_2009__50_3_a3/ %G en %F CMUC_2009__50_3_a3