@article{10_1017_S0017089500030627,
     author = {Ch\={o}, Muneo},
     title = {Spectral properties of p-hyponormal operators},
     journal = {Glasgow mathematical journal},
     pages = {117--122},
     year = {1994},
     volume = {36},
     number = {1},
     doi = {10.1017/S0017089500030627},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500030627/}
}