@article{10_2307_121041,
     author = {G. Christol and Z. Mebkhout},
     title = {On the index theorem for \(p\)-adic differential equations. {III}},
     journal = {Annals of mathematics},
     year = {2000},
     volume = {151},
     number = {2},
     doi = {10.2307/121041},
     zbl = {1078.12500},
     url = {http://geodesic.mathdoc.fr/articles/10.2307/121041/}
}