@article{10_4064_sm162_1_4,
     author = {Michael Langenbruch},
     title = {Characterization of surjective partial differential operators
 on spaces of real analytic functions},
     journal = {Studia Mathematica},
     pages = {53--96},
     publisher = {mathdoc},
     volume = {162},
     number = {1},
     year = {2004},
     doi = {10.4064/sm162-1-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm162-1-4/}
}