%0 Journal Article %A Kannappan, PL. %A Sahoo, P. K. %T On a functional equation connected to sum form nonadditive information measures on an open domain. I. %J Kybernetika %D 1986 %P 268-275 %V 22 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1986__22_3_a5/ %G en %F KYB_1986__22_3_a5