%0 Journal Article %A Stanisław Godlewski %T Homotopy dependence of fundamental sequences, relative fundamental equivalence of sets and a generalization of cohomotopy groups %J Fundamenta Mathematicae %D 1970 %P 63-91 %V 69 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-69-1-63-91/ %R 10.4064/fm-69-1-63-91 %G en %F 10_4064_fm_69_1_63_91