%0 Journal Article %A Kenneth Millett %T Homotopy sequences of fibrations %J Fundamenta Mathematicae %D 1973 %P 49-62 %V 79 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-79-1-49-62/ %R 10.4064/fm-79-1-49-62 %G en %F 10_4064_fm_79_1_49_62