Spectrum of collective vibrations of vortex domain walls in a ferromagnetic nanostripe array Vitaly A. Orlov, Gennady S. Patrin and Irina N. Orlova Eur. Phys. J. B, 95 3 (2022) 52 Published online: 17 March 2022 DOI: 10.1140/epjb/s10051-022-00315-y