@article{MZ_1987__196_173897,
     author = {Pietro Aiena},
     title = {A {Characterization} of {Riesz} {Operators.}},
     journal = {Mathematische Zeitschrift},
     pages = {491--496},
     publisher = {mathdoc},
     volume = {196},
     year = {1987},
     zbl = {0618.47014},
     url = {http://geodesic.mathdoc.fr/item/MZ_1987__196_173897/}
}