%0 Journal Article
%A A. Markov
%T Unsolvability of certain problems in topology
%J Doklady Akademii Nauk
%D 1958
%P 978-980
%V 123
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1958_123_6_a5/
%G ru
%F DAN_1958_123_6_a5