%0 Journal Article
%A V. G. Boltyanskii
%A M. M. Postnikov
%T On principal notions of algebraic topology. Axiomatic definition of cohomology groups
%J Doklady Akademii Nauk
%D 1960
%P 745-747
%V 133
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1960_133_4_a1/
%G ru
%F DAN_1960_133_4_a1