%0 Journal Article %A Douglas Derry %T Polygons of Order n in Ln with n+2 Vertices. %J Mathematica Scandinavica %D 1968 %P 73-95 %V 23 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1968__23_166059/ %F MS2_1968__23_166059