%0 Journal Article
%A G. I. Shishkin
%T Approximation of the solutions of singularly perturbed boundary
%J Doklady Akademii Nauk
%D 1987
%P 39-43
%V 296
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1987_296_1_a8/
%G ru
%F DAN_1987_296_1_a8