Kahn, R. A. (2012),  Reducing the uncertainties in direct aerosol radiative forcing, Surveys in Geophysics, 33:701–721, doi:10.1007/s10712-011-9153-z

Ermolli, I., Matthes, K., Dudok de Wit, T., Krivova, N. A., Tourpali, K., Weber, M., Unruh, Y. C., Gray, L., Langematz, U., Pilewskie, P., Rozanov, E., Schmutz, W., Shapiro, A., Solanki, S. K., Thuillier, G., and Woods, T. N. (2012), Recent variability of the solar spectral irradiance and its impact on climate modelling, Atmos. Chem. Phys. Discuss., 12, 24557-24642, doi:10.5194/acpd-12-24557-2012.