%0 Journal Article %A Donald Cook %T Complete exact sequences %J Fundamenta Mathematicae %D 1976 %P 9-11 %V 92 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-92-1-9-11/ %R 10.4064/fm-92-1-9-11 %G en %F 10_4064_fm_92_1_9_11