Muradov, Adalat, Yadulla Hasanli, Nazim Hajiyev, and Rovshan Akbarov. 2018. “Modelling the Impact of the Solar Activity on Demographic and Economic Indicators”. International Journal of Energy Economics and Policy 8 (4):120-24. https://mail.econjournals.com/index.php/ijeep/article/view/6534.