“Comparison Between the Two Methods of Ridge Regression and Principal Components Regression Using the Monte Carlo Simulation by MSE” (2021) Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), 46(1), pp. 338–360. doi:10.55562/jrucs.v46i1.86.