Spin Modes in Elliptical Nanorings in the Vortex State: Two-Dimensional Mapping by Micro-Focused Brillouin Light Scattering. - Madami, M.; Tacchi, S.; Gubbiotti, G.; Carlotti, G.; Montoncello, F.; Capuzzo, G.; Giovannini, L.; Nizzoli, F.; Tanigawa, H.; Ono, T. (IEEE Transactions on Magnetics, 2010)