@article{SSL_1954-1955__1__A21_0,
     author = {Cartier, P.},
     title = {Th\'eorie des caract\`eres {I.} {D\'efinition} des caract\`eres},
     journal = {S\'eminaire "Sophus Lie"},
     note = {talk:18},
     pages = {1--8},
     publisher = {Secr\'etariat math\'ematique},
     volume = {1},
     year = {1954-1955},
     language = {fr},
     url = {http://archive.numdam.org/item/SSL_1954-1955__1__A21_0/}
}