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@article{MET_1976__23_186169, author = {A. Chaudhuri}, title = {A {Non-Negativity} {Criterion} for a {Certain} {Variance-Estimator.}}, journal = {Metrika}, pages = {201--206}, publisher = {mathdoc}, volume = {23}, year = {1976}, zbl = {0346.62009}, url = {http://geodesic.mathdoc.fr/item/MET_1976__23_186169/} }
A. Chaudhuri. A Non-Negativity Criterion for a Certain Variance-Estimator.. Metrika, Tome 23 (1976), pp. 201-206. http://geodesic.mathdoc.fr/item/MET_1976__23_186169/