%0 Journal Article %A Thomas Sanders %T A Whitehead theorem in CG-shape %J Fundamenta Mathematicae %D 1981 %P 131-140 %V 113 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-113-2-131-140/ %R 10.4064/fm-113-2-131-140 %G en %F 10_4064_fm_113_2_131_140