Alhemyari, Zuhair, and H. A. Al-Dabag. “A Class of Shrinkage Estimators for the Shape Parameter of the Weibull Lifetime Model”. Pakistan Journal of Statistics and Operation Research, vol. 8, no. 2, Mar. 2012, pp. 167-84, https://doi.org/10.18187/pjsor.v8i2.477.