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2. S. A.Mulaik , Foundations of Factor Analysis , CRC Press , New York , 2nd edn, 2010
3. D. J.Bartholomew , Three faces of factor analysis , in Factor Analysis at 100: Historical Developments and Future Directions , ed. R. Cudeck and R. C. MacCallum , Lawrence Erlbaum Associates , Mahwah, NJ , 2007 , pp. 9–21
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5. Principal component analysis