@article{MZ_1987__194_173820,
     author = {M. Radjabalipour},
     title = {An {Extension} of {Putnam-Fuglede} {Theorem} for {Hyponormal} {Operators.}},
     journal = {Mathematische Zeitschrift},
     pages = {117--120},
     publisher = {mathdoc},
     volume = {194},
     year = {1987},
     zbl = {0591.47020},
     url = {http://geodesic.mathdoc.fr/item/MZ_1987__194_173820/}
}