1. Rayleigh, Lor Proc.Roy.Soc.Lond. A 90, 324–328 (1914).
2. Craik, A., Latham, R., Fawkes, R. & Gribbon, P. J. Fluid Mech. 112, 347–362 (1981).
3. Bohr, T., Dimon, P. & Putkaradze, V. J.Fluid Mech. 254, 635–648 (1993).
4. Bohr, T., Ellegaard, C., Hansen, A. E. & Haaning, A. Physica B 228, 1–10 (1996).
5. Bohr, T., Putkaradze, V. & Watanabe, S. Phys. Rev. Lett. 79, 1038–1041 (1997).