@article{SHC_1949-1950__2__A18_0,
     author = {Cartan, H.},
     title = {Cohomologie r\'eelle d'un espace fibr\'e principal diff\'erentiable. {I} : notions d'alg\`ebre diff\'erentielle, alg\`ebre de {Weil} d'un groupe de {Lie}},
     journal = {S\'eminaire Henri Cartan},
     note = {talk:19},
     pages = {1--10},
     publisher = {Secr\'etariat math\'ematique},
     volume = {2},
     year = {1949-1950},
     language = {fr},
     url = {http://www.numdam.org/item/SHC_1949-1950__2__A18_0/}
}