@article{ASENS_1968_4_1_4_617_0,
     author = {Goldschmidt, Hubert},
     title = {Prolongations of linear partial differential equations. {II.} {Inhomogeneous} equations},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {617--625},
     publisher = {Elsevier},
     volume = {Ser. 4, 1},
     number = {4},
     year = {1968},
     doi = {10.24033/asens.1173},
     mrnumber = {39 #4878},
     zbl = {0172.13602},
     language = {en},
     url = {http://archive.numdam.org/articles/10.24033/asens.1173/}
}