“Suggested Technique for Estimation Preference Grades Proportion for Several Independent Groups by Using the Self - Consistent Criteria in Factor Analysis”. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ) 29, no. 1 (October 20, 2021): 17–31. Accessed November 19, 2024. https://alhadhar.com/raf-journal/index.php/JAUCS/article/view/374.