@article{10_1017_S0017089500008600,
     author = {Zhu, Jiang},
     title = {Some isometric characterizations of ln\ensuremath{\infty}},
     journal = {Glasgow mathematical journal},
     pages = {117--121},
     year = {1992},
     volume = {34},
     number = {1},
     doi = {10.1017/S0017089500008600},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500008600/}
}