%0 Journal Article
%A Dădărlat, Marius
%A Eilers, Søren
%T The Bockstein Map is Necessary
%J Canadian mathematical bulletin
%D 1999
%P 274-284
%V 42
%N 3
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1999-033-0/
%R 10.4153/CMB-1999-033-0
%F 10_4153_CMB_1999_033_0