@article{SL_1966-1967__7__A3_0,
     author = {Ramis, Jean-Pierre},
     title = {Factorialit\'e des anneaux de polyn\^omes de s\'eries formelles et de s\'eries convergentes. {Th\'eor\`eme} de pr\'eparation en g\'eom\'etrie diff\'erentiable banachique},
     journal = {S\'eminaire d'analyse},
     note = {talk:3},
     pages = {1--14},
     year = {1966-1967},
     publisher = {Secr\'etariat math\'ematique},
     volume = {7},
     zbl = {0165.35701},
     language = {fr},
     url = {https://www.numdam.org/item/SL_1966-1967__7__A3_0/}
}