Lu, Zhou, Giray Gozgor, Chi Keung Marco Lau, and Sudharshan Reddy Paramati. “The Dynamic Impacts of Renewable Energy and Tourism Investments on International Tourism: Evidence from the G20 Countries”. Journal of Business Economics and Management 20, no. 6 (August 27, 2019): 1102-1120. Accessed December 12, 2019. https://journals.vgtu.lt/index.php/JBEM/article/view/10181.