وعد الله سليم وسام. “A Proposedformula for Solving the Problem of Multicollinearity and Restricted Data With A Simulation”. IRAQI JOURNAL OF STATISTICAL SCIENCES 13, no. 3 (December 1, 2013): 298–314. Accessed September 6, 2025. https://tanmiyat.uomosul.edu.iq/index.php/stats/article/view/29306.