Kamionka, T., Martens, M., Chou, K. W., Curcic, M., Drews, A., Schütz, G., Tyliszczak, T., Stoll, H., Van Waeyenberge, B., & Meier, G. (2010). Magnetic antivortex-core reversal by circular-rotational spin currents. Physical Review Letters, 105:. doi:10.1103/PhysRevLett.105.137204.