نايف قتيبة نبيل, and صالح رباب عبد الرضا. “Analysis of Robust Principal Components Depends on the Some Methods of Projection-Pursuit”. Journal of Economics and Administrative Sciences 21, no. 83 (June 1, 2015): 317. Accessed March 31, 2025. https://jeasiq.uobaghdad.edu.iq/index.php/JEASIQ/article/view/654.