A. Hamdaoui, M. Terbeche, and A. Benkhaled, “On shrinkage estimators improving the James-Stein estimator under balanced loss function”, Pak.j.stat.oper.res., vol. 17, no. 3, pp. 711–727, Sep. 2021, doi: 10.18187/pjsor.v17i3.3663.