I. S. Hanaish و A. M. Abutartour, "A Comparison of the Pre-test and Shrinkage Estimators for a Finite Population Mean in a Bivariate Normal Distribution with Equal Marginal Variances Under Distrust Coefficient", jar, م 17, ص 34–48, يناير 2021, doi: 10.65540/jar.v17i.298.