%0 Journal Article %A Sjödin, Tord %T Bernstein’s analyticity theorem for quantum differences %J Czechoslovak Mathematical Journal %D 2007 %P 67-73 %V 57 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMJ_2007__57_1_a5/ %G en %F CMJ_2007__57_1_a5