1. Adnan, N., Ahmad, M. H., & Adnan, R. (2006). A comparative study on some methods for handling multicollinearity problems. Matematika, 22(2), 109–119.
2. Akdeniz, F., & Erol, H. (2003). Mean square error matrix comparison of some biased estimators in linear regression. Communications in Statistics-Theory and Methods, 32(12), 2389–2413.
3. Alin, A. (2010). Multicollinearity. Wiley Interdisciplinary Reviews: Computational Statistics, 2(3), 370–374.
4. Basarir, A., Karli, B., & Bilgic, A. (2006). An evaluation of Turkish agricultural production performance. International Journal of Agriculture and Biology, 8(4), 511–515.
5. Bowerman, B. L., & O’ Connell, R. T. (1990). Linear statistical models an applied approach (2nd ed.). Boston: PWS-KENT Publishing Co.