%0 Journal Article
%A Vidyasagar Ramchandra Padmawar
%T Stratification, Midzuno-Sen Strategy and Nonnegative Unbiased Variance Estimation.
%J Metrika
%D 1994
%P 21-27
%V 41
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MET_1994__41_5_176490/
%F MET_1994__41_5_176490