@article{AM_2000_151_2_a1,
     author = {G. Christol and Z. Mebkhout},
     title = {Sur le th\'eor\`eme de l'indice des \'equations diff\'erentielles $p$-adiques. {III.} {(On} the index theorem for $p$-adic differential equations. {III)}},
     journal = {Annals of mathematics},
     publisher = {mathdoc},
     volume = {151},
     number = {2},
     year = {2000},
     url = {http://geodesic.mathdoc.fr/item/AM_2000_151_2_a1/}
}