1. R. Kaiser and A. Tilgner, Phys. Rev. E 63, 37301 (2001).
2. R. Kaiser, B. J. Schmitt, and F. H. Busse, Geophys. Astrophys. Fluid Dyn. 77, 93 (1994).
3. A. G. Kosovichev, J. Schou, P. H. Scherrer, R. S. Bogart, R. I. Bush, J. T. Hoeksema, J. Aloise, L. Bacon, et al., Solar Phys. 170, 43 (1997).
4. F. Krause and K.-H. Rädler, Mean-Field Magnetohydrodynamics and Dynamo Theory (Akademie, Berlin, 1980), p. 271.
5. W. N. Press, S. A. Teukolsky, W. T. Vetterling, and B. P. Flannery, Numerical Recipes. The Art of Scientific Computing (C++Code), 3rd ed. (Cambridge Univ. Press, Cambridge, 2007), p. 1262.