« RELATIVE EFFICIENCY OF RIDGE REGRESSION AND ORDINARY LEAST SQUARE ESTIMATORS ON LINEAR REGRESSION MODELS AT DIFFERENT LEVELS OF MULTICOLLINEARITY ». FULafia Journal of Science and Technology 3, no. 2 (décembre 31, 2017): 77–81. Consulté le mai 17, 2026. https://lafiascijournals.org.ng/index.php/fjst/article/view/83.