Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MOMA_1955__59_176958, author = {Hans Hornich}, title = {\"Uberall unl\"osbare lineare partielle {Differentialgleichungen.}}, journal = {Monatshefte f\"ur Mathematik}, pages = {34--42}, publisher = {mathdoc}, volume = {59}, year = {1955}, zbl = {0064.09303}, url = {http://geodesic.mathdoc.fr/item/MOMA_1955__59_176958/} }
Hans Hornich. Überall unlösbare lineare partielle Differentialgleichungen.. Monatshefte für Mathematik, Tome 59 (1955), pp. 34-42. http://geodesic.mathdoc.fr/item/MOMA_1955__59_176958/