%0 Journal Article %A I. A. Ibragimov %A R. Z. Khas'minskii %T On sequentional estimation of the location parameter for families of distributions with discontinuous densities %J Teoriâ veroâtnostej i ee primeneniâ %D 1974 %P 700-713 %V 19 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/TVP_1974_19_4_a2/ %G ru %F TVP_1974_19_4_a2