الشيخ ساوس, and الهاشمي ربيعي. “The Use of Principal Components Analysis in the Formation of a Sustainable Human Development Index for Arab Countries”. Journal of Economics and Administrative Sciences 24, no. 108 (November 1, 2018): 376. Accessed July 10, 2025. https://www.jeasiq.uobaghdad.edu.iq/index.php/JEASIQ/article/view/1337.