@article{ELMA_1992__47_3_141525,
     author = {Wolfgang Walter},
     title = {A {Useful} {Banach} {Algebra.}},
     journal = {Elemente der Mathematik},
     pages = {26--32},
     publisher = {mathdoc},
     volume = {47},
     number = {3},
     year = {1992},
     zbl = {0895.46025},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1992__47_3_141525/}
}