@article{MS2_1953__1_165496,
     author = {TH{\textcent}GER BANG},
     title = {The theory of metric spaces applied to infinitely differentiable functions},
     journal = {Mathematica Scandinavica},
     pages = {137--152},
     publisher = {mathdoc},
     volume = {1},
     year = {1953},
     zbl = {0051.04405},
     url = {http://geodesic.mathdoc.fr/item/MS2_1953__1_165496/}
}