1. Belsley D A, Kuh E and Welsch R E. 1980. Regression diagnostics: Identifying influential data sources of collinearity. 1st Edition, John Wiley and Sons, New York, pp. 292.
2. Bowerman B L and O’Connell R T. 1990. Linear statistical models: An applied approach. 2nd ed. Duxbury, Belmont, CA.
3. Malau-Aduli A E O, Aziz M A, Kojina T, Niibayashi T, Oshima K and Komatsu M. 2004. Fixing collinearity instability using principal component and ridge regression analyses in the relationship between body measurements and body weight in Japanese Black cattle. Journal of Animal and Veterinary Advances 3: 856–63.
4. Menard S. 1995. Applied logistic regression analysis. Sage University Paper Series on Quantitative Application in the Social Sciences, 07–106. Sage, Thousand Oaks, CA.
5. Myres R. 1990. Classical and modern regression with applications. 2nd ed. Duxbury, Boston, MA.