%0 Journal Article
%A Hu, Sze-Tsen
%T An axiomatic approach to homotopy theory without using the relative groups
%J Portugaliae mathematica
%D 1961
%P 95-103
%V 20
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1961__20_2_114855/
%G en
%F PORMA_1961__20_2_114855