@article{MS2_1976__38_166457,
     author = {Herbert Busemann},
     title = {Remark on },
     journal = {Mathematica Scandinavica},
     pages = {81--82},
     publisher = {mathdoc},
     volume = {38},
     year = {1976},
     zbl = {0324.50001},
     url = {http://geodesic.mathdoc.fr/item/MS2_1976__38_166457/}
}