عبد المجيد حياوي هيام. “Employment of the Factor Analysis Approach to Predict the Transfer Function Models”. IRAQI JOURNAL OF STATISTICAL SCIENCES 12, no. 1 (June 1, 2012): 97–118. Accessed September 6, 2025. https://tanmiyat.uomosul.edu.iq/index.php/stats/article/view/29207.