%0 Journal Article %A B.R. Ebanks %A P.K. Sahoo %A P. Kannappan %T Characterizations of sum form information measures on open domains. %J Aequationes mathematicae %D 1997 %P 1-30 %V 54 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1997__54_3_137691/ %F AM2_1997__54_3_137691