@article{2076, author = {Mira Fernandes, A. de}, title = {Um teorema de multiplica\c c\~ao}, journal = {Portugaliae mathematica}, volume = {1}, year = {1940}, pages = {340-342}, zbl = {0023.30903}, mrnumber = {0002923}, language = {pt}, url = {http://dml.mathdoc.fr/item/2076} }
Mira Fernandes, A. de. Um teorema de multiplicação. Portugaliae mathematica, Tome 1 (1940) pp. 340-342. http://gdmltest.u-ga.fr/item/2076/