@article{SHC_1959-1960__12_2_A2_0, author = {Douady, Adrien}, title = {P\'eriodicit\'e du groupe unitaire}, journal = {S\'eminaire Henri Cartan}, note = {talk:11}, pages = {1--16}, publisher = {Secr\'etariat math\'ematique}, volume = {12}, number = {2}, year = {1959-1960}, zbl = {0129.39001}, language = {fr}, url = {http://www.numdam.org/item/SHC_1959-1960__12_2_A2_0/} }
Douady, Adrien. Périodicité du groupe unitaire. Séminaire Henri Cartan, Périodicité des groupes d'Homotopie stables des groupes classiques, d'après Bott, Tome 12 (1959-1960) no. 2, Exposé no. 11, 16 p. http://www.numdam.org/item/SHC_1959-1960__12_2_A2_0/
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