Al-talb, Mhasen, Azza Al-qusaymy, and Abeer Al-shabkon. “Comparison Between Two Methods, H.S.L. And The Iteration Method to Estimate Parameter of Ridge”. TANMIYAT AL-RAFIDAIN 29, no. 86 (June 1, 2007): 170–179. Accessed December 4, 2025. https://tanmiyat.uomosul.edu.iq/index.php/tanmiyat/article/view/29963.