References:

Duvall Jr., T. L., and Gizon, L., 2000, Solar Physics, 192, 177

Elsworth, Y. P., and Thompson, M. J., 2004, A&G, 45, 5.14

Gough, D. O., 1985 Solar Physics, 100, 65

Handler, G., et al., 2004, RAS, MNRAS, 347, 454

Kurtz, D. W., 2004, Solar Physics. 220, 123

Leighton, R. B., et al., 1962, ApJ, 135, 474

Shibahashi, H., and Takahara, K., 2004, Proceedings of the SOHO 14 / GONG 2004 Workshop (ESA SP-559). "Helio- and Asteroseismology: Towards a Golden Future",. Editor: D. Danesy., p.627

Stein, R., et al., 2004, Solar Physics, 220, 229

Thompson, M. J. 2004, A&G, 45, 4.21