%0 Journal Article %A Marian Mrozek %T Index pairs and the fixed point index for semidynamical systems with discrete time %J Fundamenta Mathematicae %D 1989 %P 179-194 %V 133 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-133-3-179-194/ %R 10.4064/fm-133-3-179-194 %G en %F 10_4064_fm_133_3_179_194