Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1955__14_2_114752, author = {Campos Ferreira, Jaime}, title = {Sur la notion d'ordre infinit\'esimal}, journal = {Portugaliae mathematica}, pages = {43--62}, publisher = {mathdoc}, volume = {14}, number = {2}, year = {1955}, mrnumber = {0076007}, zbl = {0065.34302}, language = {fr}, url = {http://geodesic.mathdoc.fr/item/PORMA_1955__14_2_114752/} }
Campos Ferreira, Jaime. Sur la notion d'ordre infinitésimal. Portugaliae mathematica, Tome 14 (1955) no. 2, pp. 43-62. http://geodesic.mathdoc.fr/item/PORMA_1955__14_2_114752/