@article{SDPP_1967-1968__9_2_A3_0,
     author = {A'campo, Norbert},
     title = {Th\'eor\`eme de pr\'eparation diff\'erentiable ultra-m\'etrique},
     journal = {S\'eminaire Delange-Pisot-Poitou},
     note = {talk:17},
     pages = {1--7},
     year = {1967-1968},
     publisher = {Secr\'etariat math\'ematique},
     volume = {9},
     number = {2},
     mrnumber = {244240},
     zbl = {0188.19304},
     language = {fr},
     url = {https://www.numdam.org/item/SDPP_1967-1968__9_2_A3_0/}
}