Safaa Saffawi, dr., and Talal Al-Hasso. “A Comparison Between Least Squares and Adjusted Ridge Regression Methods With Application”. TANMIYAT AL-RAFIDAIN 33, no. 103 (June 1, 2011): 46–57. Accessed September 8, 2025. https://tanmiyat.uomosul.edu.iq/index.php/tanmiyat/article/view/29605.