%0 Journal Article %A Ma, L. %T On relations between homology and homotopy groups %J Portugaliae mathematica %D 1949 %P 107-135 %V 8 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1949__8_3_114679/ %G en %F PORMA_1949__8_3_114679