@article{10_1017_S0017089599970246,
     author = {CH\={O}, MUNEO and HURUYA, TADASI},
     title = {Putnam{\textquoteright}s inequality for p-hyponormal n-tuples},
     journal = {Glasgow mathematical journal},
     pages = {13--17},
     year = {1999},
     volume = {41},
     number = {1},
     doi = {10.1017/S0017089599970246},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089599970246/}
}