@article{SHC_1949-1950__2__A2_0, author = {Serre, J-P.}, title = {Groupes d'homotopie}, journal = {S\'eminaire Henri Cartan}, note = {talk:2}, pages = {1--7}, publisher = {Secr\'etariat math\'ematique}, volume = {2}, year = {1949-1950}, language = {fr}, url = {http://www.numdam.org/item/SHC_1949-1950__2__A2_0/} }
Serre, J-P. Groupes d'homotopie. Séminaire Henri Cartan, Tome 2 (1949-1950), Exposé no. 2, 7 p. http://www.numdam.org/item/SHC_1949-1950__2__A2_0/
Extension and classification of continuous mappings. (Lectures in Topology - Michigan, 1941). Singular homology theory (Annals of Math. , tome 45, 1944, p. 407-447. | MR | Zbl
:Beiträge zur Topologie der Deformationen, I, II (Proc. Amst. tome 38, 1935, p. 112-119 et p. 521-528). | Zbl
:Introduction to Topology - Princeton mathematical Series, n° 11 , 1949. | MR | Zbl
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