%0 Journal Article %A Béla Bollobás %T Best possible bounds of the norms of inverses adjoined to normed algebras %J Studia Mathematica %D 1974 %P 87-96 %V 51 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-51-2-87-96/ %R 10.4064/sm-51-2-87-96 %G en %F 10_4064_sm_51_2_87_96