Oktavilia, Shanty, and Firmansyah Firmansyah. “The Relationships of Environmental Degradation and Trade Openness in Indonesia”. International Journal of Economics and Financial Issues 6, no. 6S (October 4, 2016): 125–129. Accessed April 23, 2024. https://econjournals.com/index.php/ijefi/article/view/3137.