A. Benkhaled, T. A. . Esmail, N. M. . ALoraini, A. A. . Alkhathami, and A. Hamdaoui, “On the Shrinkage Estimators for a Multivariate Normal Mean Vector with Unknown Diagonal Covariance Matrix”, Contemp. Math., vol. 6, no. 4, pp. 4402–4417, Jul. 2025.