%0 Journal Article %A A. Alexiewicz %A Z. Semadeni %T Some properties of two-norm spaces and a characterization of reflexivity of Banach spaces %J Studia Mathematica %D 1960 %P 115-132 %V 19 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-19-2-115-132/ %R 10.4064/sm-19-2-115-132 %G en %F 10_4064_sm_19_2_115_132