%0 Journal Article
%A P.J. Hilton
%T On the homotopy groups of unions of spaces.
%J Commentarii mathematici Helvetici
%D 1955
%P 59-92
%V 29
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1955__29_139095/
%F CMH_1955__29_139095