%0 Journal Article %A Sam Young %T Polynomial factors of light mappings on an arc %J Fundamenta Mathematicae %D 1968 %P 49-52 %V 62 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-62-1-49-52/ %R 10.4064/fm-62-1-49-52 %G en %F 10_4064_fm_62_1_49_52