%0 Journal Article
%A N. E. Steenrod
%T Cohomology operations, and obstructions to extending continuous functions
%J Matematika
%D 1958
%P 11-48
%V 2
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAT_1958_2_6_a1/
%G ru
%F MAT_1958_2_6_a1