Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MAT_1961_5_5_a5, author = {L. V. H\"ormander}, title = {Differential equations without solutions}, journal = {Matematika}, pages = {115--120}, publisher = {mathdoc}, volume = {5}, number = {5}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MAT_1961_5_5_a5/} }
L. V. Hörmander. Differential equations without solutions. Matematika, Tome 5 (1961) no. 5, pp. 115-120. http://geodesic.mathdoc.fr/item/MAT_1961_5_5_a5/