@article{PORMA_1940__1_4_114566,
     author = {Mira Fernandes, A. de},
     title = {Um teorema de multiplica\c{c}\~ao},
     journal = {Portugaliae mathematica},
     pages = {340--342},
     publisher = {mathdoc},
     volume = {1},
     number = {4},
     year = {1940},
     mrnumber = {0002923},
     zbl = {0023.30903},
     language = {pt},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1940__1_4_114566/}
}