Voir la notice de l'article provenant de la source Hellenic Digital Mathematics Library
@article{MR_1980__17_a6, author = {B. Bollobas and E. Galanis}, title = {An {Inequality} {Involving} a {Hermitian} {Operator} and its {Square} in a {Normed} {Space}}, 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 = {44-49}, publisher = {mathdoc}, volume = {17}, year = {1980}, language = {gr}, url = {http://geodesic.mathdoc.fr/item/MR_1980__17_a6/} }
B. Bollobas; E. Galanis. An Inequality Involving a Hermitian Operator and its Square in a Normed Space. Μαθηματική Επιθεώρηση , Tome 17 (1980), p. 44-49. http://geodesic.mathdoc.fr/item/MR_1980__17_a6/