Vezmar, Stanislav, Anton Spajić, Danijel Topić, Damir Šljivac, and Lajos Jozsa. 2014. “Positive and Negative Impacts of Renewable Energy Sources”. International Journal of Electrical and Computer Engineering Systems 5 (2):47-55. https://ijeces.ferit.hr/index.php/ijeces/article/view/833.