@article{GAU_1979-1981__7-8__A7_0,
     author = {Robba, Philippe},
     title = {Factorisation d'op\'erateurs diff\'erentiels \`a coefficients rationnels},
     journal = {Groupe de travail d'analyse ultram\'etrique},
     note = {talk:12},
     pages = {1--3},
     publisher = {Secr\'etariat math\'ematique},
     volume = {7-8},
     year = {1979-1981},
     zbl = {0484.47023},
     language = {fr},
     url = {http://www.numdam.org/item/GAU_1979-1981__7-8__A7_0/}
}