%0 Journal Article %A Hans Havlicek %A Peter Å emrl %T From geometry to invertibility preservers %J Studia Mathematica %D 2006 %P 99-109 %V 174 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm174-1-8/ %R 10.4064/sm174-1-8 %G en %F 10_4064_sm174_1_8