Erdoğan, Seyfettin, et al. “Investigation of Causality Analysis Between Economic Growth and CO2 Emissions: The Case of BRICS – T Countries”. International Journal of Energy Economics and Policy, vol. 9, no. 6, Oct. 2019, pp. 430-8, https://econjournals.com.tr/index.php/ijeep/article/view/8546.