@article{SDPP_1970-1971__12__A8_0,
     author = {Christol, Gilles},
     title = {Op\'eration de {Cartier} et vecteurs de {Witt}},
     journal = {S\'eminaire Delange-Pisot-Poitou. Th\'eorie des nombres},
     note = {talk:13},
     pages = {1--7},
     publisher = {Secr\'etariat math\'ematique},
     volume = {12},
     year = {1970-1971},
     mrnumber = {396574},
     zbl = {0272.14004},
     language = {fr},
     url = {http://archive.numdam.org/item/SDPP_1970-1971__12__A8_0/}
}