Cycloidal vortex motion in easy-plane ferromagnets due to interaction with spin waves A. S. Kovalev, F. G. Mertens and H. J. Schnitzer Eur. Phys. J. B, 33 2 (2003) 133-145 Published online: 04 June 2003 DOI: 10.1140/epjb/e2003-00150-3