@article{M2AN_1967__1_5_97_0,
     author = {Robert, F.},
     title = {Calcul du rapport maximal de deux normes sur $\mathbf {R}^n$},
     journal = {Revue fran\c{c}aise d'informatique et de recherche op\'erationnelle},
     pages = {97--118},
     publisher = {Dunod},
     address = {Paris},
     volume = {1},
     number = {5},
     year = {1967},
     mrnumber = {228164},
     zbl = {0159.44101},
     language = {fr},
     url = {http://www.numdam.org/item/M2AN_1967__1_5_97_0/}
}