@article{2189, author = {Ma, L.}, title = {On relations between homology and homotopy groups}, journal = {Portugaliae mathematica}, volume = {8}, year = {1949}, pages = {107-135}, zbl = {0038.36503}, mrnumber = {0038659}, language = {en}, url = {http://dml.mathdoc.fr/item/2189} }
Ma, L. On relations between homology and homotopy groups. Portugaliae mathematica, Tome 8 (1949) pp. 107-135. http://gdmltest.u-ga.fr/item/2189/