%0 Journal Article %A Jussi Mattas %T Segal algebras, approximate identities and norm irregularity in $C_0(X,A)$ %J Studia Mathematica %D 2013 %P 99-112 %V 215 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm215-2-1/ %R 10.4064/sm215-2-1 %G en %F 10_4064_sm215_2_1