@article{CMH_1977__52_139699,
     author = {Yngve Domar},
     title = {On the {Banach} algebra {A} (...) for smooth sets ... {Rn.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {357--372},
     year = {1977},
     volume = {52},
     zbl = {0356.43002},
     url = {http://geodesic.mathdoc.fr/item/CMH_1977__52_139699/}
}