Kamionka, T., Martens, M., Chou, K.-W., Drews, A., Tyliszczak, T., Stoll, H., Van Waeyenberge, B., & Meier, G. (2011). Magnetic antivortex-core reversal by rotating magnetic fields. Physical Review B, 83:. doi:10.1103/PhysRevB.83.224422.