%0 Journal Article %A Kuzma, Bojan %T Noninvertibility preservers on Banach algebras %J Czechoslovak Mathematical Journal %D 2006 %P 919-921 %V 56 %N 3 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/CMJ_2006__56_3_a9/ %G en %F CMJ_2006__56_3_a9