Nagi, Hisham M. H. “Delineating and Calculating the Length of Yemen’s Mainland Shoreline”. International Journal of Alternative Fuels and Energy 5, no. 1 (آوریل 30, 2021): 1–9. دسترسی می 19, 2024. https://psmjournals.org/index.php/ijafe/article/view/543.