@article{AM2_1985__29_137094,
     author = {Walter Benz},
     title = {Isometrien in normierten {R\"aumen.}},
     journal = {Aequationes mathematicae},
     pages = {204--209},
     publisher = {mathdoc},
     volume = {29},
     year = {1985},
     zbl = {0588.46015},
     url = {http://geodesic.mathdoc.fr/item/AM2_1985__29_137094/}
}