%0 Journal Article %A Tim Porter %T Borsuk's Theory of Shape and Cech Homotopy. %J Mathematica Scandinavica %D 1973 %P 83-89 %V 33 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1973__33_166314/ %F MS2_1973__33_166314