@article{1183503683, author = {Eilenberg, Samuel}, title = {On spherical cycles}, journal = {Bull. Amer. Math. Soc.}, volume = {47}, number = {11}, year = {1941}, pages = { 432-434}, language = {en}, url = {http://dml.mathdoc.fr/item/1183503683} }
Eilenberg, Samuel. On spherical cycles. Bull. Amer. Math. Soc., Tome 47 (1941) no. 11, pp. 432-434. http://gdmltest.u-ga.fr/item/1183503683/