%0 Journal Article
%A S. V. Emel'yanov
%A S. K. Korovin
%A S. V. Nikitin
%A M. G. Nikitina
%T Observers and differentiators of the output of nonlinear systems
%J Doklady Akademii Nauk
%D 1989
%P 556-560
%V 306
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1989_306_3_a9/
%G ru
%F DAN_1989_306_3_a9