On the relationship between global, hemispheric and latitudinal averaged air surface temperature (GISS time series) and solar activity, Souza Echer et al, 10/2008; read more here. (notrickszone.com)
Analysis of contributions to global mean air surface temperature rise (pnas.org)
Empirical analysis of the solar contribution to global mean air surface temperature change (PDF), Nicola Scafetta, 12/2009, Journal of Atmospheric and Solar - Terrestrial Physics, Volume 71, Issues 17 - 18, pp. 1916 - 1923 (notrickszone.com)