1. Bhattacharyya , A. 1946,7,8 Sankhy�� 8 1 14 201 218 315 328
2. Stuart , A. Ord , J. K. 1991 Kendall's Advanced Theory of Statistics
3. The lower bound for the variance of unbiased estimators for one-directional family of distributions;Akahira;Ann. Inst. Statist. Math.,1986
4. The convergence of Bhattacharyya bounds;Blight;Biometrika,1974
5. On the attainment of Cram��r-Rao and Bhattacharyya bounds for the variance of an estimate;Fend;Ann. Math. Statist.,1959