@article{GAMA_1974_1974_1_a16,
     author = {Machado Cardoso, Jayme},
     title = {Sobre an\'eis de {Boole} sem unidade.},
     journal = {Gaceta matem\'atica},
     pages = {143-144},
     publisher = {mathdoc},
     volume = {26},
     number = {5-6},
     year = {1974},
     url = {http://geodesic.mathdoc.fr/item/GAMA_1974_1974_1_a16/}
}