%0 Journal Article
%A V. Fedorchuk
%T $\theta$-spaces and perfect irreducible mappings of topological spaces
%J Doklady Akademii Nauk
%D 1967
%P 757-759
%V 174
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1967_174_4_a5/
%G ru
%F DAN_1967_174_4_a5