%0 Journal Article %A LAWRENCE ETIGSON %T Equivalence of 'Cube' and 'Octahedron' Functional Equations (Short Communication) %J Aequationes mathematicae %D 1973 %P 306-307 %V 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1973__9_136369/ %F AM2_1973__9_136369