%0 Journal Article
%A Ya. Z. Tsypkin
%A A. S. Poznyak
%T A generalized method of instrumental variables in problems of the
%J Doklady Akademii Nauk
%D 1989
%P 1068-1072
%V 306
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1989_306_5_a9/
%G ru
%F DAN_1989_306_5_a9