@article{GAU_1983-1984__11__A8_0,
     author = {Robba, Philippe},
     title = {Quelques remarques sur les op\'erateurs diff\'erentiels d'ordre 1},
     journal = {Groupe d'\'etude d'analyse ultram\'etrique},
     note = {talk:12},
     pages = {1--8},
     year = {1983-1984},
     publisher = {Secr\'etariat math\'ematique},
     volume = {11},
     zbl = {0589.12023},
     language = {fr},
     url = {https://www.numdam.org/item/GAU_1983-1984__11__A8_0/}
}