H.D. Kambezidis, L.D. Melas, D.H. Kampezidou and B.E. Psiloglou  (2015) “Effect of Tropospheric Nitrogen Dioxide on Incoming Solar Radiation”, Journal of Solar Energy Research Updates, 2(1), pp. 14–17. doi: 10.15377/2410-2199.2015.02.01.3.