Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1956__15_2_114767, author = {Silveira, M. da}, title = {General operational calculus in n variables}, journal = {Portugaliae mathematica}, pages = {49--69}, publisher = {mathdoc}, volume = {15}, number = {2}, year = {1956}, mrnumber = {0083693}, zbl = {0074.09604}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1956__15_2_114767/} }
Silveira, M. da. General operational calculus in n variables. Portugaliae mathematica, Tome 15 (1956) no. 2, pp. 49-69. http://geodesic.mathdoc.fr/item/PORMA_1956__15_2_114767/