%0 Journal Article
%A I. Berstein
%A Tudor Ganea
%T The category of a map and of a cohomology class
%J Fundamenta Mathematicae
%D 1961
%P 265-279
%V 50
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm-50-3-265-279/
%R 10.4064/fm-50-3-265-279
%G en
%F 10_4064_fm_50_3_265_279