@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/}
}