@article{10_1017_S0017089500009356,
     author = {Ch\={o}, Muneo},
     title = {Semi-normal operators on uniformly smooth {Banach} spaces},
     journal = {Glasgow mathematical journal},
     pages = {273--276},
     year = {1990},
     volume = {32},
     number = {3},
     doi = {10.1017/S0017089500009356},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500009356/}
}