%0 Journal Article %A S.S. Zarkovic %T On the Efficiency of Sampling with Varying Probabilities and the Selection of Units with Replacement. %J Metrika %D 1960 %P 53-60 %V 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MET_1960__3_175071/ %F MET_1960__3_175071