Voir la notice de l'article provenant de la source Hellenic Digital Mathematics Library
@article{MR_1981__21_a6, author = {Konstantin Stathakopoulos}, title = {Stetigkeit des {Spektrums} im {Kleinen} {Einer} {Klasse} {Nichtlineare} {Operatoren} {I}}, 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 = {67-80}, publisher = {mathdoc}, volume = {21}, year = {1981}, language = {gr}, url = {http://geodesic.mathdoc.fr/item/MR_1981__21_a6/} }
Konstantin Stathakopoulos. Stetigkeit des Spektrums im Kleinen Einer Klasse Nichtlineare Operatoren I. Μαθηματική Επιθεώρηση , Tome 21 (1981), p. 67-80. http://geodesic.mathdoc.fr/item/MR_1981__21_a6/