@article{MR_1979__16_a2,
     author = {I. J. Maddox},
     title = {Schur΄s {Theorem} for {Operators}},
     journal = {M\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta} E\ensuremath{\pi}\ensuremath{\iota}\ensuremath{\theta}\ensuremath{\varepsilon}\ensuremath{\acute\omega}\ensuremath{\rho}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\eta}
},
     pages = {18-21},
     publisher = {mathdoc},
     volume = {16},
     year = {1979},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1979__16_a2/}
}