@article{10_4064_sm194_3_5,
     author = {Osamu Hatori},
     title = {Isometries between groups of invertible
 elements in {Banach} algebras},
     journal = {Studia Mathematica},
     pages = {293--304},
     publisher = {mathdoc},
     volume = {194},
     number = {3},
     year = {2009},
     doi = {10.4064/sm194-3-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm194-3-5/}
}