Altun, G. and Zencirkiran, M. 2021. Green metric sustainability index: Evaluation of Turkish universities in the Top 500 category in 2020. New Trends and Issues Proceedings on Advances in Pure and Applied Sciences. 2022, 1 (Nov. 2021), 13–22. DOI:https://doi.org/10.18844/gjpaas.v14i1.6782.