1. Brown, T. 1987, in Solar Radiative Output Variation, ed. P. Foukal (Boulder: NCAR), 87
2. Is the sun constant
3. Dziembowski, W. A., Goode, P. R., Kosovichev, A. J. & Schou, J. 2000, ApJ, in press
4. Solar radius variations over the past 265 years