@article{MAN_1989__284_4_164545,
     author = {Klaus Langmann},
     title = {Picard-Borel-R\"aume.},
     journal = {Mathematische Annalen},
     pages = {137--160},
     publisher = {mathdoc},
     volume = {284},
     number = {4},
     year = {1989},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1989__284_4_164545/}
}