1. V. S. Huzurbazar, “The general forms of distributions admitting sufficient statistics for parameters in nonregular cases,” Typescript, 1964.
2. A. N. Kolmogorov, “Unbiased estimates,”Translations Series 1, Amer. Math. Soc., 11 (1950), 144–170.
3. A. G. Laurent, “Conditional distribution of order statistics and distribution of the reduced j’th order statistic of the exponential model,”Ann. Math. Statist., 34 (1963), 652–657.
4. G. P. Patil, “Minimum variance unbiased estimation and certain problems of additive number theory,”Ann. Math. Statist., 34 (1963), 1050–1056.
5. Karl Pearson,Tables of Incomplete Beta Function, Cambridge University Press, 1934.