%0 Journal Article %A Jaroslav Zemánek %T Geometric characteristic of semi-Fredholm operators and their asymptotic behaviour %J Studia Mathematica %D 1984 %P 219-234 %V 80 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-80-3-219-234/ %R 10.4064/sm-80-3-219-234 %G en %F 10_4064_sm_80_3_219_234