@article{MAN_1970__187_162011,
     author = {P. ARMINJON},
     title = {Existence et r\'egularit\'e de solutions \'el\'ementaires d'un op\'erateur diff\'erentiel abstrait.},
     journal = {Mathematische Annalen},
     pages = {117--126},
     publisher = {mathdoc},
     volume = {187},
     year = {1970},
     zbl = {0184.18103},
     url = {http://geodesic.mathdoc.fr/item/MAN_1970__187_162011/}
}