Maen، R. E. A.، و Kamel، M. M. (2018). The Relationship between Economic Growth and Environmental Pollution: Testing the Environmental Kuznets Curve Hypothesis in Egypt. مجلة التجارة والتمويل، ع2 ، 1 - 18. مسترجع من http://search.mandumah.com/Record/969705
Maen، Ramadan El. A.، و Maie M. Kamel. "The Relationship between Economic Growth and Environmental Pollution: Testing the Environmental Kuznets Curve Hypothesis in Egypt." مجلة التجارة والتمويل ع2 (2018): 1 - 18. مسترجع من http://search.mandumah.com/Record/969705