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Convergence rates for two-stage confidence intervals based on U-statistics
Mukhopadhyay, N., (1988)
A consistent and asymptotically efficient two-stage procedure to construct fixed width confidence intervals for the mean
Mukhopadhyay, N., (1980)
Remarks on sequential estimation of a linear function of two means : the normal case
Mukhopadhyay, N., (1977)