@article{1102778725, author = {Guyker, James}, title = {Commuting hyponormal operators.}, journal = {Pacific J. Math.}, volume = {91}, number = {2}, year = {1980}, pages = { 307-325}, language = {en}, url = {http://dml.mathdoc.fr/item/1102778725} }
Guyker, James. Commuting hyponormal operators.. Pacific J. Math., Tome 91 (1980) no. 2, pp. 307-325. http://gdmltest.u-ga.fr/item/1102778725/