@article{M2AN_1967__1_5_97_0,
     author = {Robert, F.},
     title = {Calcul du rapport maximal de deux normes sur $\mathbf {R}^n$},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {97--118},
     publisher = {Dunod},
     address = {Paris},
     volume = {1},
     number = {5},
     year = {1967},
     mrnumber = {228164},
     zbl = {0159.44101},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/M2AN_1967__1_5_97_0/}
}