Further evidence of important environmental information content in red-to-green ratios as depicted in paintings by great masters - Zerefos, C. S.; Tetsis, P.; V. Amiridis; Zerefos, C. S.; Luterbacher, J.; Eleftheratos, K.; Gerasopoulos, E.; S. Kazadzis; Papayannis, A. (Atmos. Chem. Phys., 2014)