@article{JRAM_1986__366_152820,
     author = {Philippe Robba},
     title = {Symmetric powers of the p-adic {Bessel} equation.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {194--220},
     publisher = {mathdoc},
     volume = {366},
     year = {1986},
     zbl = {0574.12021},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1986__366_152820/}
}