%0 Journal Article
%A Bullejos, Manuel
%A Cegarra, Antonio M.
%T A 3-Dimensional Non-Abelian Cohomology of Groups With Applications to Homotopy Classification of Continuous Maps
%J Canadian journal of mathematics
%D 1991
%P 265-296
%V 43
%N 2
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1991-015-7/
%R 10.4153/CJM-1991-015-7
%F 10_4153_CJM_1991_015_7