%0 Journal Article %A R. Powers %A T. Riedel %A P. Sahoo %T Some models of geometries and a functional equation %J Colloquium Mathematicum %D 1993 %P 165-173 %V 66 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-66-1-165-173/ %R 10.4064/cm-66-1-165-173 %G en %F 10_4064_cm_66_1_165_173