@article{10_4064_sm_120_1_61_74,
     author = {Robert Deville and   and  },
     title = {Analytic and $C^k$ approximations of norms in separable {Banach} spaces},
     journal = {Studia Mathematica},
     pages = {61--74},
     publisher = {mathdoc},
     volume = {120},
     number = {1},
     year = {1996},
     doi = {10.4064/sm-120-1-61-74},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-120-1-61-74/}
}