@article{CMUC_1978_19_2_a9,
     author = {John, Kamil and Zizler, V\'aclav E.},
     title = {On rough norms on {Banach} spaces},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {335--349},
     year = {1978},
     volume = {19},
     number = {2},
     mrnumber = {500126},
     zbl = {0374.46014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1978_19_2_a9/}
}