%0 Journal Article
%A P. J. Bickel
%A Y. Ritov
%T Efficient estimation using both direct and indirect observations
%J Teoriâ veroâtnostej i ee primeneniâ
%D 1993
%P 233-258
%V 38
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TVP_1993_38_2_a2/
%G ru
%F TVP_1993_38_2_a2