@article{MS2_1966__18_165941,
     author = {Lars Ingelstam},
     title = {Symmetry in {Real} {Banach} {Spaces.}},
     journal = {Mathematica Scandinavica},
     pages = {53--68},
     year = {1966},
     volume = {18},
     zbl = {0143.15702},
     url = {http://geodesic.mathdoc.fr/item/MS2_1966__18_165941/}
}