%0 Journal Article %A T. Maćkowiak %T Semi-confluent mappings and their invariants %J Fundamenta Mathematicae %D 1973 %P 251-264 %V 79 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-79-3-251-264/ %R 10.4064/fm-79-3-251-264 %G en %F 10_4064_fm_79_3_251_264