@article{IM_1969__9_142003,
     author = {H. GOLDSCHMIDT},
     title = {Points singuliers d'un op\`erateur diff\'erentiel analytique.},
     journal = {Inventiones mathematicae},
     pages = {165--174},
     publisher = {mathdoc},
     volume = {9},
     year = {1969},
     zbl = {0187.03001},
     url = {http://geodesic.mathdoc.fr/item/IM_1969__9_142003/}
}