@article{PORMA_1995__52_3_47518,
     author = {Sequeira, Fernando Manuel},
     title = { algebras and the symbolic calculus of {Sebasti\~ao} e {Silva.} {(Les} alg\`ebres  et le calcul symbolique de {Sebasti\~ao} e {Silva.)}},
     journal = {Portugaliae mathematica},
     pages = {251--278},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {1995},
     zbl = {0848.46029},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1995__52_3_47518/}
}