Tirtayasa, S., Akrim, A., Gunawan, A., Sulasmi, E., & Anisah, H. U. (2021). Significance of Economic Activities in Environmental Protection: Evidence from a Panel of 4-ASEAN Economies. International Journal of Energy Economics and Policy, 11(2), 420–426. Retrieved from https://econjournals.com/index.php/ijeep/article/view/10831