%0 Journal Article
%A A. A. Zlotnik
%A I. D. Turetaev
%T Sharp estimates for error and optimality of two-layered efficient
%J Doklady Akademii Nauk
%D 1983
%P 1306-1311
%V 272
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1983_272_6_a6/
%G ru
%F DAN_1983_272_6_a6