@article{MAN_1996__305_2_165433,
     author = {Richard Crew},
     title = {The differential {Galois} theory of regular singular p-adic differential equations.},
     journal = {Mathematische Annalen},
     pages = {45--64},
     publisher = {mathdoc},
     volume = {305},
     number = {2},
     year = {1996},
     zbl = {0854.14009},
     url = {http://geodesic.mathdoc.fr/item/MAN_1996__305_2_165433/}
}