%0 Journal Article
%A R. V. Mikhailov
%T Asphericity and approximation properties of crossed modules
%J Sbornik. Mathematics
%D 2007
%P 521-535
%V 198
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_2007_198_4_a3/
%G en
%F SM_2007_198_4_a3