%0 Journal Article
%A Ronald Brown
%A Keith A. Hardie
%A Klaus Heiner Kamps
%A Timothy Porter
%T A homotopy double groupoid of a Hausdorff space
%J Theory and applications of categories
%D 2002
%P 71-93
%V 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TAC_2002_10_a1/
%G en
%F TAC_2002_10_a1