%0 Journal Article %A A. Ya. Helemskii %T Metric version of flatness and Hahn–Banach type theorems for normed modules over sequence algebras %J Studia Mathematica %D 2011 %P 135-160 %V 206 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm206-2-3/ %R 10.4064/sm206-2-3 %G en %F 10_4064_sm206_2_3