%0 Journal Article %A S. Kurepa %T On some functional equations in Banach spaces %J Studia Mathematica %D 1960 %P 149-158 %V 19 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-19-2-149-158/ %R 10.4064/sm-19-2-149-158 %G en %F 10_4064_sm_19_2_149_158