Ball, W. T., Unruh, Y. C., Krivova, N. A., Solanki, S., Wenzler, T., Mortlock, D. J., & Jaffe, A. H. (2012). Reconstruction of total solar irradiance 1974-2009. Astronomy and Astrophysics, 541:. doi:10.1051/0004-6361/201118702.