@article{MAN_1896__47_157787,
     author = {Emile Picard},
     title = {Sur l'extension des id\'ees de {Galois} \`a la th\'eorie des \'equations diff\'erentielles. {(Extrait} d'une lettre adress\'ee \`a {Mr.} {Klein)}},
     journal = {Mathematische Annalen},
     pages = {155--156},
     publisher = {mathdoc},
     volume = {47},
     year = {1896},
     zbl = {27.0239.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1896__47_157787/}
}