%0 Journal Article
%A E. Thomas
%A L.L. Larmore
%T Group Extensions and Principal Fibrations.
%J Mathematica Scandinavica
%D 1972
%P 227-248
%V 30
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1972__30_166237/
%F MS2_1972__30_166237