1. Dhrymes, P. J. (1978). Introductory econometrics. New York, NY: Springer [Chap. 6].
2. Judge, G. G., Griffiths, W. E., Carter Hill, R., Lutkepohl, H., & Lee, T.-C. (1985). The theory and practice of econometrics. New York, NY: John Wiley and Sons [Chap. 14 and Chap. 15].
3. Morrison, D. F. (1976). Multivariate statistical methods. New York, NY: McGraw-Hill Book Company.
4. Parsons, L. J., & Schultz, R. L. (1976). Marketing models and econometric research. New York, NY: North Holland.
5. Theil, H. (1971). Principles of econometrics. New York, NY: John Wiley and Sons [Chap. 9 and Chap. 10].