%0 Journal Article
%A A. Chaudhuri
%T A Non-Negativity Criterion for a Certain Variance-Estimator.
%J Metrika
%D 1976
%P 201-206
%V 23
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MET_1976__23_186169/
%F MET_1976__23_186169