@article{BSMF_1981__109__83_0,
     author = {Christol, Gilles},
     title = {Syst\`emes diff\'erentiels lin\'eaires $p$-adiques, structure de {Frobenius} faible},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {83--122},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {109},
     year = {1981},
     doi = {10.24033/bsmf.1933},
     mrnumber = {82k:12027},
     zbl = {0459.12020},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/bsmf.1933/}
}