Žiković, SaÅ¡a, and Ivan Gržeta. “Competitiveness of Renewable Energy Sources on the Liberalized Electricity Market in South Eastern Europe Countries”. International Journal of Energy Economics and Policy, vol. 7, no. 3, July 2017, pp. 326-3, https://econjournals.com./index.php/ijeep/article/view/4845.